The discovery of the structure of DNA in 1953 changed the scientific understanding of heredity, as it revealed that DNA was the molecule responsible for genetic information.
Why were proteins (and not DNA) thought to be the molecule of heredity?Proteins were thought to be the molecule of heredity because they were more easily studied than DNA, and because proteins were responsible for many of the traits that were passed down from generation to generation.Proteins also appeared to be more stable and were believed to be better suited for the task of storing and transferring genetic information. But prior to this discovery, proteins were thought to be responsible for heredity.This was because proteins have a complex structure, consisting of different combinations of amino acids, and it was thought that these amino acids could act as a template for inheritance.Furthermore, proteins are found in nearly all cells, and are involved in the production of enzymes, hormones and other molecules, making them an ideal candidate for the molecule of heredity.Additionally, experiments at the time had demonstrated that proteins could be altered through exposure to radiation or chemicals, leading to the suggestion that proteins could be responsible for mutations and genetic variation.Thus, proteins were thought to be the molecule of heredity before the discovery of DNA.To learn more about proteins (and not DNA) thought to be the molecule of heredity refer to:
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Which of the following is an application for cloning and polymerase chain reaction (PCR) technologies?
A. Amplification of DNA fragments from a drop of semen at a crime scene
B. Analyzing the speed of enzymatic function in chemical reactions
C. Generating large quantities of insulin for use by diabetics
D. Measuring blood cholesterol levels in routine medical tests
Answer: its A
Explanation: I took the test
PLEASE HURRY!!! IS TIMED!!
A plant that has round seeds is crossed with one that has wrinkled seeds. The offspring had half round seeds and half wrinkled seeds. What were the genotypes of the parents?
A plant that has round seeds is crossed with one that has wrinkled seeds. The offspring had half round seeds and half wrinkled seeds. What were the genotypes of the parents?
Rr x Rr
RR x rr
Rr x rr
RR x Rr
In complete dominance the dominant allele inhibits the expression of the recessive allele. Genotypes with at least one dominant allele (homozygous dominnat or heterozygous) express the dominant phenotype. Option C) Rr x rr
What is complete dominance?Complete dominance is the inheritance pattern in which one of the alleles hides the expression of the other allele.
The dominant allele inhibits the recessive allele when together in the same genotype (heterozygous individuals), and only the dominant phenotype can be expressed.
The recessive allele can only express in an homozygous recessive genotype.
In the exposed example, let us assume the phenotype round seeds is dominant over wrinkled seeds. Let us also assume that this feature is coded by a diallelic gene that expresses complete dominance, in which
R is the dominant alleler is the recessive alleleAccording to this information and the phenotypic ratio among the offspring, we could assume that
The plant with wrinkled seeds is homozygous recessive because it expresses the recessive phenotype, rr.The genotype of the plant with round seeds might be either homozygous dominant or heterozygous, because it expresses the dominant phenotype.If this plant was homozygous dominant, the whole F1 should have round seeds because this plant can only provide dominant alleles to the progeny.
If it was heterozygous, the F1 plants can have either round seeds or wrinkled seeds, because this parental plant can provide a dominant and a recessive allele.
In conclussion,
parental plant with wrinkled seeds is rrparental plant with round seeds is RrOption C is correct. Rr x rr
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Colour-blindness is a X-linked, recessive trait. If a normal-sighted
carrier woman marries a colour-blind man, what is the probability
that they will have an offspring who is colour-blind and which
gender could be afflicted?
a
b
d
e
0%
25%, female only
50%, male or female
50%, males only
75%, male or female
The probability that they will have an offspring who is color-blind and which gender could be afflicted is 50% males only.
What is colorblindness and how does it occur?Normal vision is represented by (XX), and colorblindness by (XX) (XX). The letter X denotes the sex-linked recessive gene for color blindness. If a colorblind guy (Y) marries a normal lady (XX), all male progeny (sons) will be born in the F 1 generation (XY).
The female progeny (daughters) will have a normal phenotypic, but they will be heterozygous genetically (XX). These girls are carriers of the condition because they have the recessive gene for color blindness.
If a carrier woman with normal vision (heterozygous for color blindness) marries a normal male (XY), the F 2 generation may have the following progeny: 50% of the girls are normal and 50% are carriers for the disorders; 50% of the males are colorblind and 50% have normal vision.
As a result, all sex-linked genes transfer from male to female and then back to a male of the F 2 generation (grand-children generation). That is, one in every two (50% or 0.5) of her grandson is colorblind.
Hence, 50% males will be affected.
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The three broadest groups used
for classification
Classification is defined as placing and arranging the known species into different groups or taxa according to similarities and dissimilarities.
What is broadcast groups?
Broadcast groups are a special type of public, private, or unlisted group where only group owners and managers can post to the group. Group members can read posts and comment on them.Four standards for digital radio systems exist worldwide: IBOC (In-Band On-Channel), DAB (Digital Audio Broadcasting), ISDB-TSB (Integrated Services Digital Broadcasting-Terrestrial Sound Broadcasting), and DRM (Digital Radio Mondiale)The two types of broadcast media are video and audio. Video uses images and is popular means of communicating on television and the internet. Audio is a verbal account and is used on radio, television, and the internet.
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Classification is defined as placing and arranging the known species into different groups or taxa according to similarities and dissimilarities.
What are broadcast groups?Broadcast groups are a special type of public, private, or unlisted group where only group owners and managers can post to the group. Group members can read posts and comment on them.
Four standards for digital radio systems exist worldwide: IBOC (In-Band On-Channel), DAB (Digital Audio Broadcasting), ISDB-TSB (Integrated Services Digital Broadcasting-Terrestrial Sound Broadcasting), and DRM (Digital Radio Mondiale)
The two types of broadcast media are video and audio. Video uses images and is popular means of communicating on television and the internet. Audio is a verbal account and is used on radio, television, and the internet.
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3. List 3 natural sources and 2 anthropogenic sources of CO2 in the atmosphere.
Answer:
Natural sources of CO2 in the atmosphere include respiration from animals, decomposition of organic matter, and volcanic eruptions. Anthropogenic sources of CO2 in the atmosphere include burning of fossil fuels, deforestation, and agricultural activities.
Explanation:
The law of conservation of matter states that matter can be neither created nor destroyed. Your friend shows you the following chemical equation: He says that because the oxygen atoms are split between two different molecules in the products, the equation does not support the law of conservation of matter. Is your friend right? Explain your answer. Draw a model showing the number of each type of atom in the reactants and products. Use your model to explain your answer. Read the assignment carefully and make sure you answer each part of the question or questions. When you're done, look over your response closely to make sure your ideas are shown clearly.
Answer:
The law of conservation of matter states that the matter can be neither created nor destroyed.
Explanation:
Your friend shows you the following chemical equation CACO3CAO plus CO2 he says that because the oxygen atoms are split between two different molecules in the products the equation does not support the law of conservation of matter is your friend write explain your answer draw a model showing the number of each type of atom in the reactants and products use your model explain your answer.
what is tardigrade? Like what it is you know ? please tell meeeeeeeeeee
Answer:
what is tardigrade? known colloquially as water bears or moss piglets, are a phylum of eight-legged segmented micro-animals.
Tardigrades pose no threat to humans. Scientists have yet to identify a species of tardigrade that spreads disease.
The following behaviors help birds increase their reproductive success in different ways. Which one most directly increases a bird’s chance of mating?
Choose 1 answer:
(Choice A)
A male peacock shows off his large, colorful tail feathers to attract a female.
(Choice B)
Downy woodpecker parents bring their offspring food until the offspring are ready to leave the nest.
(Choice C)
A bald eagle eats a large amount of prey that it will digest over a period of a few days.
A male peacock shows off his large, colorful tail feathers to attract a female directly increases a bird’s chance of mating. So, the correct option is (A).
What is Mating?Mating is defined as the pairing of opposite-sex or hermaphrodite organisms for the purposes of sexual reproduction where fertilization is the fusion of two gametes. Insemination is the union of the sex organs of two sexually reproducing animals for conception and subsequent internal fertilization.
The male is attracted to the female usually by chemical attraction, the release of pheromones, then the male grabs the female, adjusts to the mating position, and finally transfers a package of sperm, the spermatophore, to the female. and attaches. In such a situation, the male peacock attracts the female by spreading its colorful feathers.
Thus, a male peacock shows off his large, colorful tail feathers to attract a female directly increases a bird’s chance of mating. So, the correct option is (A).
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How does gravity explain our observations of pattern in space?
The General Theory of Relativity explains the effects of gravity on space and time by proposing that gravity is not a force, but rather a distortion of space-time. This means that mass causes space-time to curve or warp, and objects travel along the curved paths.
What is force?Force has been an interaction between two objects which has been results in the change in the motion of the objects. It has been a vector quantity, meaning it has both magnitude and direction.
Force can be used just to push, pull as well as twist objects. It can be used to lift, along with the move and accelerate objects. Force can also be used to create energy and is an important part of mechanics.
Therefore, we can say that force is an important aspect of science and can help us to understand the physical world around us.
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what is the divsion of the nucleus
Answer:
Explanation:
Nuclear division is the process of dividing the nucleus. Nuclear division is the process through which the nucleus of a cell splits, producing two daughter nuclei, each with a full set of chromosomes. Mitosis and meiosis are the two basic kinds of nuclear division.
A mitosis is a form of nuclear division that happens in somatic cells and is crucial for tissue development and repair. Mitosis occurs when the nucleus' chromosomes are duplicated, and the cell splits into two identical daughter cells, each with the same number of chromosomes as the parent cell.
Meiosis is a type of nuclear division that happens in reproductive cells and is responsible for sperm and egg cell production. The nucleus' chromosomes are duplicated during meiosis, and the cell divides into four non-identical daughter cells, each having half the number of chromosomes as the parent cell.
Mitosis and meiosis are both required for living creatures to grow, repair, and reproduce.
What are two similarities and two differences between
grouper and bluefin tuna aquaculture.
Similarities:
Grouper and bluefin tuna are both highly valued meat species that are extensively grown in aquaculture.Floating cages or pens are commonly used to farm both species in coastal marine habitats.Differences:
Because grouper develop more slowly and require more room, they are often farmed at lower numbers than bluefin tuna.Bluefin tuna are often farmed using a process known as "fattening," which involves catching the fish at an early age and raising them in captivity until they reach market size, whereas grouper are typically farmed from juvenile fish until they reach market size.Approximately what distance had the rock fallen at 3.5 seconds? A)120 ft B) 150 ft C) 170 ft D) 200 ft
Approximately, distance is 150ft. Hence option (B) 150 ft, is correct answer.
What distance had the rock fallen at 3.5 seconds?The distance a rock has fallen after 3.5 seconds can be determined using the equation for calculating the distance an object has fallen under the force of gravity.
This equation is d = 1/2*gt2, where d is the distance, g is the acceleration of gravity (9.8m/s2), and t is the time (3.5 seconds). Plugging in these values, the distance d is equal to 242.5 ft.
Therefore, the rock has fallen approximately 150 ft after 3.5 seconds.
The distance a rock will fall in 3.5 seconds depends on its initial velocity and the acceleration due to gravity.
Assuming the initial velocity is zero, the rock will be accelerating at a rate of 32 ft/s2 due to gravity.
Therefore, the distance the rock has fallen after 3.5 seconds can be calculated using the equation d = 1/2at2.
Substituting a = 32 ft/s2 and t = 3.5 s into the equation yields a distance of 150 ft. In conclusion, the rock has fallen approximately 150 ft in 3.5 seconds.
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Describe the journey of a carbon atom through all four of Earth's spheres, beginning with carbon dioxide gas in our atmosphere, and ending as part of a marine snail shell .
PLEASE ANSWER FAST WILL GIVE BRAINLIEST!!!!!
Answer:
The carbon cycle
Explanation:
on land a flow of carbon from the atmoshpere to plants with a subject called photosynthesis, then it flows back to the atmosphere. It does this with plant and animal respiration and decomposition.
The table below shows the fossils of organisms found in various layers of an undisturbed rock:
Fossils In Rock Layers
Layer (from top) Fossil in Layer
1 X, W
2 W
3 Z
4 Y, U
Which statement about the organisms whose fossils are found in the rock is correct?
The same period of time saw the existence of both Organism Y and Organism U. The correct option is C.
What are fossils?Any surviving remains, impression, or evidence of a once-living thing from a previous geological epoch is referred to as a fossil. Examples include animal or microbial imprints on stone, bones, shells, exoskeletons, and more.
Rock layers and the associated fossils are older than the layers above them, according to the Law of Superposition. If you look at your list, layer 4 of the rock contains the oldest fossils and becomes younger as it rises.
The oldest fossils are found in rock layer 4, which makes them Y and U. Because you cannot find them in any other rock layer, it can be assumed that they were extinct at the time the other strata developed.
Thus, the correct option is C.
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Your question seems incomplete, the missing options are:
Organism W existed much before Organism Y.
Organism Y existed over the longest period of time.
Organism Y and Organism U were alive over the same time span.
Organism W existed over a shorter period of time than Organism X.
When a karyotype is made, only a single cell's set of chromosomes is included in the image. Which of the following best explains why genetic counselors know that the other somatic cells will have the same condition as the one seen?
Genetic counselors know that the other somatic cells will have the same condition as the one seen in the karyotype because all somatic cells in an organism have the same set of chromosomes, which are replicated during cell division.
What is a karyotype?A karyotype is a visual representation of the complete set of chromosomes in a single cell of an organism. It is typically arranged in pairs, with the chromosomes lined up in a specific order based on their size and shape.
Karyotypes are used to identify chromosomal abnormalities, such as missing or extra chromosomes, and to diagnose genetic disorders. They can be created by staining a cell and then photographing it under a microscope.
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Create and Present Your Own Organism
My organism is called the Red Panda (Ailurus fulgens). It is a mammal native to the eastern Himalayas and southwestern China. The Red Panda is the only living species of its genus, Ailurus, and is closely related to the Giant Panda, although it has a much more specialized diet. It is an excellent climber and has a thick, woolly coat to help keep it warm in its cold mountain habitat.
The Red Panda has evolved over time to become more specialized in its diet and habitat. Its thick fur helps to keep it warm in the cold mountain environment, while its long, bushy tail helps it balance while climbing trees. Its diet consists mainly of bamboo, but it also eats fruits, eggs, and small animals. Its sharp claws and teeth help it to break open bamboo stalks and to defend itself against predators. Is it living now or extinct?
❑ Where is/was the organism found?
❑ Describe organism’s key characteristics (Physical appearance and behavioral traits)
❑ Explain why organism’s traits are useful (Hint: Use what you learned about natural
selection)
Answer:
The Red Panda is found in the eastern Himalayas and southwestern China. It has a reddish-brown coat and a long, bushy tail. It is an excellent climber and has sharp claws and teeth to break open bamboo stalks.
Physical appearance and behavioral traits are useful because they help the Red Panda survive in its cold mountain habitat. behavioral traits include its ability to climb trees and its strong prey>predator instincts.
Explanation:
4. Distinguish between the different kinds of microscopes. Discuss the relative advantages and disadvantages of light and electron microscopes.
Light microscopes are the most common type of microscope and use visible light to magnify an image.
Distinguish between the different kinds of microscopes?
They are relatively inexpensive and easy to use, and can be used to observe living cells and organelles.However, because they use visible light, the resolution of these microscopes is limited.Electron microscopes, on the other hand, use a beam of electrons to magnify an image. Because electrons have a much shorter wavelength than light, electron microscopes can achieve much higher resolutions, allowing them to observe smaller objects and structures. The downside of electron microscopes is that they are much more expensive and complicated to use and require a vacuum chamber to function properly.In summary, light microscopes are much more affordable and easier to use, but have limited resolution.Electron microscopes are much more expensive and complex, but can achieve much higher resolutions. Both have their advantages and disadvantages, and each is best suited for certain applications.To learn morea bout the different kinds of microscopes refer to:
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Which human agricultural practice leads to the breaking down of chemicals and nitrous oxide production? (1 p
O the use of synthetic fertilizers
O cutting down trees to plant crops
O raising cattle on natural grasslands
O the use of community landfills
The use of synthetic fertilizers leads to the breaking down of chemicals and nitrous oxide production
What is the impact of nitrous oxide?
Nitrous oxide (N2O) is a powerful greenhouse gas with a global warming potential of 298 times that of carbon dioxide (CO2) over a 100-year period. It is primarily released into the atmosphere from agricultural activities, such as the intensive use of fertilizers, and from fossil fuel combustion. Its emissions are on the rise, and it is a significant contributor to global warming. In addition to its role in global warming, nitrous oxide also contributes to acid rain and the depletion of stratospheric ozone. It also contributes to smog and other forms of air pollution.
The use of synthetic fertilizers leads to the breaking down of chemicals and nitrous oxide production. Synthetic fertilizers contain nitrogen and phosphorus, which can be broken down by bacteria in soil to release nitrates. These nitrates can then be further broken down by nitrifying bacteria to form nitrous oxide, a greenhouse gas.
Therefore, the use of synthetic fertilizers is the correct answer.
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When comparing two organisms of similar shape, which size organism (large or small) will retain more heat in a cold environment
When comparing two organisms of similar shape, large size organism will retain more heat in a cold environment.
What are the characteristics of organisms?In biology, an organism is any living system that functions as an individual entity. All organisms are composed of cells. The idea of organism is based on the concept of minimal functional unit of life.
Organisms are classified by taxonomy into groups such as multicellular animals, plants, and fungi; or unicellular microorganisms such as protists, bacteria, and archaea.
An organism is a living being that has a cellular structure and that can independently perform all physiologic functions necessary for life. In multicellular organisms, including humans, all cells, tissues, organs, and organ systems of the body work together to maintain the life and health of the organism.
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fungi and bacteria are among the most important environmental organism this able to infect plants when they reach a suitable host plant by producing certain enzymes or toxins candidates that aid in the penetration of or ingestion through plant surfaces. however, certain plant viruses are getting access to the plant cells through what?
Answer:
Viruses can enter the plant through the roots, the stem, or through the leaves.
Explanation:
What is plant physiology ? Give answer in short form .
Answer:
it is the subdiscipline of botany concerned with the plant function and behavior encompassing all the dynamic processes of growth, metabolism, reproduction, defense, and communication that accounts fr plants being alive.
Explanation:
I hope it helps!!!!!!!
Now I know that plate movements create new features by?
I NEED HELP PLS ASAP
Answer:
Explanation:fluids are released from the rock causing the overlying mantle to partially melt
which cause new magma
Fluids released from the rock cause the mantle above to partially melt as the sinking plate descends deeper into the mantle.
What additional features are produced by plate movements? Fluids released from the rock cause the mantle above to partially melt as the sinking plate descends deeper into the mantle.Along the convergent boundary, the fresh magma (molten rock) rises and may erupt violently to create volcanoes, frequently creating arcs of islands.By illuminating how the shifting of geologic plates generates earthquakes, volcanoes, and mountain formation, the idea of plate tectonics transformed the field of earth sciences.It is believed that convection currents in the molten rock in the Earth's mantle beneath the crust are what are moving these tectonic plates.This tectonic activity produces earthquakes and volcanoes as short-term effects.Entire continents have moved over millions of years as a long-term consequence of plate tectonics.To learn more about plate movements refer
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How long are food chains?
Food chains are rarely more than four steps long.
What is food chain?A food chain is a web of links that starts with producer organisms and ends with an apex predator, detritivore, or decomposer species.A food chain also shows how organisms are related to one another by the food they eat. A different level of a food chain represents each trophic level.The food chain in the wild describes who eats whom. Every living thing, from single-celled algae to massive blue whales, requires food to survive. Each food chain represents a potential path for energy and nutrients to travel through the ecosystem. Grass, for example, generates its own food from sunlight. A rabbit consumes grass.To learn more about food chain refer to :
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2x + 3y = 34 y = 5x The solution is
The solution of the above simultaneous equation is x= 2, y = 10.
How to solve a mathematical equation?A simultaneous equation in mathematics is a finite set of equations whose common solutions are sought.
According to this question, two algebraic equations are given as follows:
2x + 3y = 34 ........eqn 1
y = 5x ......... eqn 2
First, we substitute 'y' in equation 2 into equation 1 as follows:
2x + 3(5x) = 34
2x + 15x = 34
17x = 34
x = 2
Since y = 5x, y = 5(2) = 10
Therefore, variable x = 2, while y = 10.
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What are the best non-chemical, sustainable methods for reducing damage to crops from insects? What agriculture practice would cause the greatest infestation of pests and insects?
Answer: Sorry i just needed the points thx
Explanation:im so sorry about this
Answer:
01) Best methods:
Crop rotation
Companion planting
Intercropping
Cover cropping
Natural predators (e.g. ladybugs)
Biological pest control (e.g. using parasitic wasps)
Proper irrigation and soil management
Handpicking and removing of pests
Proper storage of harvested crops
02)Greatest infestation cause:
Monoculture (growing the same crop in the same area repeatedly)
Lack of crop rotation
Overuse of chemical pesticides
Poor soil health
Poor crop storage practices
Lack of natural predators in the environment.
Determine if the statement is true or false, and why. “If a point mutation occurs in a proto-oncogene it can form an oncogene. This can stimulate excessive cell division, leading to the formation of a tumor.”
A. False, it should read ““If a point mutation occurs in a Proto-oncogene it can form an Oncogene. This can inhibit cell division, leading to the formation of a tumor.”
B. True
C. False, it should read ““If a point mutation occurs in an Oncogene it can form a Proto-oncogene. This can inhibit cell division, leading to the formation of a tumor.”
D. False, it should read ““If a point mutation occurs in an Oncogene it can form a Proto-oncogene. This can stimulate excessive cell division, leading to the formation of a tumor.”
Answer:
D. False, it should read ““If a point mutation occurs in an Oncogene it can form a Proto-oncogene. This can stimulate excessive cell division, leading to the formation of a tumor.” A point mutation in an oncogene can lead to the formation of a proto-oncogene, which can then stimulate excessive cell division. This excessive cell division can lead to the formation of a tumor, as the cells are dividing uncontrollably.
Explanation:
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What macromolecule provide instructions for growth
Nucleic acids are the macromolecule provide instructions for growth.
What are Nucleic acids?Large macromolecules called nucleic acids are necessary for all organisms and viruses to function. The preservation and expression of genetic data is a key role of nucleic acids.
DNA and nucleic acids in general are important macromolecules for the continuation of life.
The genetic material passed down from parents to offspring is called DNA, and it contains the instructions for making the many proteins required to create and sustain living cells, tissues, and organisms.
Thus, the macromolecule that provide instructions for growth is nucleic acid.
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Compare asexual and sexual reproduction. Place each statement into the correct box.
Asexual reproduction is inherited from a single parent and the offspring are produced by a single cell.
What is sexual reproduction and asexual reproduction?During sexual reproduction, when sperm from a male parent fertilizes an egg from a female parent, the result is a child who is genetically distinct from both parents.Sexual reproduction results in genetic diversity in organisms. Meiosis, the process by which sperm and egg cells are formed, is the first step in sexual reproduction.A fertilized egg is known scientifically as a zygote. The diploid number of chromosomes refers to the number of chromosomes found in all of an organism's regular cells. The zygote is an organism that is growing and evolving into a new organism.A single parent is involved in asexual reproduction. It produces offspring who are genetically identical to one another and to the parent. This is how all prokaryotes and some eukaryotes reproduce.To learn more about asexual reproduction refer to :
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What do you think Niagara waterfall and all other waterfalls have in common?
Just about every type of waterfall usually has cascades shortly upstream or downstream from it.
What are the advantages of waterfalls?A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf.
The advantages of waterfall development are that it allows for departmentalization and control. A schedule can be set with deadlines for each stage of development and a product can proceed through the development process model phases one by one.
So without waterfalls and their purification of water, we would have no fish to eat, and other animals that live in water would die which would affect the Eco system. Waterfalls also help in turning waste that runs in the water into nutrients which help plants to grow.
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Saturated fat is the type of fat that may increase blood cholesterol levels.
If a diet history consisting of a 7-day food record shows that your saturated fat intake is above recommendations, should you worry? Why or why not? Are there any other ways or tests that can be done to find out what your risk of developing heart disease is? What other components of nutritional assessment (ABCDs) would help you determine your overall risk for heart disease?
Please state what these tests would measure and how they would help assess your risk of developing heart disease.
Answer:
Saturated fat is the type of fat that may increase blood cholesterol levels.
Explanation:
Eating too much saturated fat can raise the level of LDL cholesterol in your blood.