Which event takes place first in the stages before the birth of a star?
Answer: The contracting cloud is then called a protostar. A protostar is the earliest stage of a star's life. A star is born when the gas and dust from a nebula become so hot that nuclear fusion starts.
Explanation:
Mr. Jones' class is asked to properly identify multicellular eukaryotes. Which key terms below would BEST help a student properly classify these organisms?
A. can be unicellular or multicellular, have a nucleus, and contain complex organelles
B. can only be unicellular, do not contain a nucleus, and do not contain complex organelles
C. can only be multicellular, do not contain a nucleus, and contain complex organelles
D.
can be unicellular or multicellular, have a nucleus, and do not contain complex organelles
haemoglobin is presented in........................... cells
What is a chronic disease?
Answer:
A chronic condition is a human health condition or disease that is persistent or otherwise long-lasting in its effects or a disease that comes with time. The term chronic is often applied when the course of the disease lasts for more than three months.
Explanation:
Hope you could get an idea from here.
Doubt clarification - use comment section.
Food Webs and Food Chains Worksheet
1 Look at this food chain.
lettuce
greenfly
ladybird
thrush
cat
a What does the arrow mean in a food chain?
b Name the producer in the food chain
c Name the third trophic level in the food chain.
d Name the tertiary consumer in the food chain
e What is the ultimate source of energy that drives the food chain?
Food chain is network of source energy diagram which means how one organism depends on other organism for thier enegy to alive.
a. Arrow indicates forward direction of food chain how one organism depend on other organism.
b. The producer in the food chain is Lettuce.
c. The third trophic level organism in the food chain is ladybird.
d.The tertiary consumer in the food chain is terthrush.
e. The ultimate source of energy that drives the food chain is lettuce.
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a) In a food chain, arrows show the movement of nutrients or energy from one organism to another. It refers to the direction of transfer of energy or nutrients from the organism being consumed to the organism consuming it.
b) The producer in the diagrammatic food chain is lettuce, followed by green fly, ladybug, thrush and cat. Producers—also called autotrophs—are living things that can make their own food through photosynthesis or chemosynthesis, the process by which sunlight or inorganic substances are converted into energy-rich organic molecules.
c. Ladybird is the third trophic level of the food chain. The term "trophic level" describes the place an organism occupies in a food chain or web, from where it obtains its food and energy. In this scenario the greenfly is the primary consumer at the second trophic level, while the ladybird is the secondary consumer at the third trophic level. Lettuce is the first trophic level in this scenario (producer).
d.Cat is the third largest consumer in the provided food chain. In a food chain or web, tertiary consumers are those species at the highest trophic level. Typically, they are carnivores that prey on other carnivores or secondary consumers.
e) Sun is the primary energy source that powers the food chain. Most ecosystems get their energy mostly from the sun. As the species consumes and is consumed by other organisms, it is passed along the food chain after being captured by producers (such as plants) through photosynthesis.
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Caroline set up a fourth test tube that contained a leaf and was exposed to dim
light.
After two hours the colour of the indicator solution in this test tube remained orange.
Explain why.
(hydrogen carbonate indicator test)
Answer:
Answer
+ 5.0
Answer: The NEGATIVE CONTROL is the
test tube that is filled with ONLY distilled
water.
Explanation:
A negative control of an experiment is
carried out alongside the main primary
experiment except that the treatment is
changed to something that is predicted
to have no result. In the negative
control, the student does not expect any
response. This would help the student
compare the result of a new experiment
against an already known existing results.
Analysing the experiment carried out
by the student, She filled two test tubes
with distilled water and placed a piece
of Elodea in one of the tubes, leaving
the other without a plant. The other test
tube that contains only distilled water is
the negative control because she wasn't
expecting any result from it. It's also
served as a control sample to the primary
experiment. This is observed as she
blew in each tube to add carbon dioxide,
which caused the distilled water to
become more acidic. This would help the
student know that the that experimental
results are valid and to ensure that time is
saved
Which of the following best describes the structural make-up of a gene?
Answer:
A single DNA molecule is wrapped around in proteins
Explanation:
I don't know if this is correct, but I hope I helped! ;)
Answer:
here's my answer :)
what role did the black death play in the decline of feudalism
Answer:
The Black Death brought about a decline in feudalism. The significant drop in population because of massive numbers of deaths caused a labor shortage that helped end serfdom. Towns and cities grew. The decline of the guild system and an expansion in manufacturing changed Europe's economy and society.
Explanation:
Hope This Helps~
Happy Hoildays~
~Zero~
What geological process generates the world's longest undersea mountain chain called the Mid-Atlantic Ridge?
Answer:
Plate tectonics
Explanation:
The mid atlantic ridge is an underwater mountain system formed by tectonic plates. It is the result of a divergent plate boundary.
help me please help
Answer:
1) Predation
2) Competition
3) Symbiosis
Explanation:
Answer:
1. Predation
2. Competition
3. Symbiosis
Explanation:
What flower has an ugly bud but a beautiful blossom?
Explanation:
Caladiums are tropical to sub-tropical plants grown mainly for their exquisite, colorful leaves. These foliage plants occasionally have a surprise up their metaphorical sleeve. Blooming on caladium plants isn’t common, but tubers planted in favorable locations tend to produce small flowers. These inflorescences aren’t as impactful as a rose or dahlia but have their own charm and, sometimes, a strong pleasant scent. There are several schools of thought on what to do with caladium flowers. While some growers believe pinching them off helps force energy to the tubers, others leave the small blooms with no ill effect on the plant.
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A student creates an experiment to determine the effects of oxygen on the growth of a water plant. The student fills three containers with water and adds an aquatic plant to each. Container 1 is open to the air, container 2 has a lid that prevents the exchange of air, and container 3 has a lid with a tube that pumps air into the container. After three weeks, the student observes that containers 1 and 3 have healthy green plants, while the plant in container 2 has not grown, and the leaves show browning areas.
Which explanation provides the reason for the difference in the growth of the plant in container 2?
Answer:c
Explanation:more oxygen
Answer:
yes
Explanation:
i took it
in the ecosystem energy budget, primary productivity is like _____.
Answer: Income
Explanation:
In the ecosystem energy budget, primary productivity is like income. This is because primary production is the way in which energy enters an ecosystem.
I hope this helps :}
In the ecosystem energy budget, primary productivity is like income. Therefore, the correct option is B.
What is primary productivity?Primary productivity is the rate at which organic matter is produced by photosynthesis in an ecosystem. It represents the energy that enters the ecosystem from the sun and is available for consumption by other organisms. Therefore, like income, primary productivity is a source of energy that is available to be “spent” by organisms in the ecosystem.
Option A, debt, is not an appropriate analogy for primary productivity, as it implies a negative balance. Option C, the interest rate, is also not an appropriate analogy, as it does not represent a source of energy but rather a factor that affects the rate of exchange of energy. Option D, spending, is a closer analogy, but it does not capture the fact that primary productivity is a source of energy, rather than an action that depletes energy. Therefore, the correct option is B.
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The question is incomplete, but most probably the complete question is,
In the ecosystem energy budget, primary productivity is like _____.
A). debt
B). income
C). the interest rate
D). spending
I NEED HELP PLS THISS IS HARD
Answer:
I think it's 2 number not sure but definitely not the first one for sure
what is the solid obtained at the neck of a funnel in sublimation?
Answer:
Sublimation is conversion of solid of vapors on heating and vapors to solid on cooling. The solid which undergoes sublimation is called sublime, whereas the solid obtained by cooling vapors is called sublimate.
Help plz need answer due
Thank u
Make and defend decisions regarding whether to use feed additives and growth promotants after researching and considering scientific evidence, production system needs and goals, and input from industry professionals.
Answer: Hi good evening..
No thanks
I will help whenever you need
Explanation:
Injecting hormones into young livestock can make them gain weight faster. More weight means more meat, which means more profit for the producer. Hormones also increase the production of milk by dairy cows. Hormones have been used for decades in the meat and dairy industries.
What are the three parts of the cell theory?
Answer:
All living things are composed of cells.
Cells are the basic units of structure and function for living things.
All cells come from pre-existing cells. Also, organisms grow by “adding on more cells” NOT by increasing the size of their cells.
Define bronchiole and alveoli.
Answer:
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Your bronchioles are some of the smallest airways in your lungs. Inhaled air passes through tiny ducts from the bronchioles into elastic air sacs (alveoli). The alveoli are surrounded by the alveolar-capillary membrane, which normally prevents liquid in the capillaries from entering the air sacs.
a condition in which the number of red cells or the amount of hemoglobin is below normal
Answer:
The condition is anemia.
Explanation:
Anemia is a medical condition in which the red blood cell count or the hemoglobin is less than normal.
what is to diverge plzzzzzzzzzzzzzzz
Answer:
Diverge: (in physics, meteorology, etc.) the total amount of flux escaping an infinitesimal volume at a point in a vector field, as the net flow of air from a given region.
Ophthalmology. a turning motion of the eyeballs outward in relation to each other.
Electronics. the spreading of a stream of electrons resulting from their mutual electrostatic repulsion.
Explanation:
What were the physical conditions of the Earth? Where is the evidence to support this claim?
Answer:
Water earth fire and rain hurricanes fire tornados etc
Explanation:
There are millions of physical conditions but that's the only ones I could think of.
When a cell divides via asexual reproduction :________.
i. each daughter cell receives exactly half the genetic information in the parent cell.
ii. the genetic information is randomly parceled out to the daughter cells.
iii. each daughter cell receives a nearly perfect copy of the parent cell's genetic information.
iv. each daughter cell receives the same amount of genetic information that was in the parent cell, but it has been altered.
Answer:
three number each daughter ce receives nearly perfect copy of the parents cells genetic information
Which type of plant would NOT
live on land?
A. alga
B. fern
C. moss
D. roses
Answer:
A. AIga
Explanation:
Alga can live in freshwater lakes or in salt water oceans. Most green alga occur in fresh water, usually attached to rocks and wood.
The ferns are most commonly plants of shaded damp forests of both temperate and tropical zones. Some fern species grow equally well on soil and upon rocks others are confined strictly to rocky habitats.
Mosses are distributed throughout the world except in salt water and are commonly found in moist shady locations. They are best known for those species that carpet woodland and forest floors. Hence, mosses break down exposed substrata, releasing nutrients for the use of more complex plants that succeed them.
Roses typically grow in warm climates and flower in the summer months. However, some roses can grow in the hot tropical climate found in Florida, while others can grow in hardiness zones as low as 2, which have winter temperatures that drop as low as -50 degrees Fahrenheit.
Hence, A. Alga is the correct Answer.
Cell Division Homework #1 Introduction to Cell Division Directions: Compare and contrast the following pairs of terms:
1. sister chromatids / centromeres:
2. mother cell / daughter cell: Identical
3. interphase/ cell division:
4. DNA / chromosome:
5. mitosis / cytokinesis:
Answer:
Sister chromatids / centromeres: When a single chromosome has been replicated in copies, each copy is called a sister chromatids.
A special part of the chromosome called the centromere holds the two sister chromatids together. A centromere is like a built-in rubber band for two sister chromosomes.
Mother cell / daughter cell: identical.
Daughter cells are genetically identical to the mother cell at the stage of production through mitosis.
On the other hand, at the stage of production through meiosis, the daughter cells are genetically different and contain only half of the genetic material of the mother cell.
Interphase / cell division: A cell spends most of its time in what is called interphase, and during this time it grows,
replicates its chromosomes, and prepare for cell division.
The cell then leaves Interphase, undergoes mitosis, and completes its division.
DNA / chromosome: Genes are segments of deoxyirbonucleic acid (DNA) that contain the code for specific protein that functions in one or more types of cell in the body
Chromosomes are structures within cells that contains a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.
Mitosis / cytokinesis: Basically, mitosis is a process by which the duplicated genome in a cell is separated into halves that are identical in nature.
Cytokinesis is the process where the cytoplasm of the cell divides to form two 'daughter' cells. The result is the formation of two 'daughter cells', each having a nucleus.
You contract an infection from an unknown pathogenic organism. Your doctor conducts a biochemical analysis of the pathogen and discovers that it contains chitin. The pathogen is most likely a
Answer:
Fungus
Explanation:
Chitin is a fibrous substance consisting of polysaccharides and forming the major constituent in the exoskeleton of arthropods and the cell walls of fungi. This would point to it most likely being a fungal agent. Hope this helps!
Chitin is a natural polymer and a nitrogenous carbohydrate. The cell walls of fungus pathogens are formed of the N-acetylglucosamine polymer chitin.
What are pathogens?Pathogens are germs that enter, grow, and cause sickness in their host's body. It simply needs a host body to live.
Pathogens have the ability to circumvent the immune system. It likewise relies on body chemicals to survive. Depending on the kind, these bacteria can move from one host to another in a variety of ways.
What are fungus pathogens?The plant is home to millions of fungus species. Not all of them are pathogenic. Only roughly 300 of them are capable of causing disease. Fungi can be found on the surface of your skin or inside your food. They only cause illness if they overgrow.
Fungi have two protective layers, a membrane, and a cell wall, and they are difficult to destroy. The severity of a fungal infection might vary.
What are the examples of fungus?Ringworm.Vaginal yeast infection.Jock itch. Other fungiThus, we can conclude that the unknown pathogenic organism is fungus because fungus pathogens contain chitin.
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explain how a mutation could have no effect on the organism that inherits the mutation
Answer:
A mutation could have no effect on the organism that inherits the mutation because of the chances of the organism's parents/producers. One parent may be dominantly having the mutation while the other parent may have the mutation but does not display its effects, thus labeling this parent as a carrier of the trait/mutation. Drawing a punnet square would best be used to describe the possibilities of each offspring and how each carries or shows the mutation inherited from their parents.
hope this helpsss
The primary food for supplying energy for muscular activity is protein. Group of answer choices True False Next
Answer:
Carbohydrates, such as sugar and starch, for example, are readily broken down into glucose, the body's principal energy source. Glucose can be used immediately as fuel, or can be sent to the liver and muscles and stored as glycogen.
what is the fastest growing organ in the human body
Answer:
I think it would be the brain since we are told everyday is a learning day so the more we learn the more it grow
What two-word term has been used to describe the annual shopping and sports mayhem in Philadelphia and the time when U.S. retailers typically show a profit?
The two-word term used to describe the annual shopping and sports is Black Friday.
From the United States (U.S.) financial history, the two-term word black Friday was first used in 1869.
The first annual black Friday occured in Philadelphia in which alot of retailers attracted their key customers and made profits through the discount they placed on their products.
Black Friday was used to describe the financial crisis after the United States's gold market crashed.
Literally, black should depict something negative or loss but on the contrary, the business world uses black to describe profit.
Therefore, the two-word term used to describe the annual shopping and sports is Black Friday.
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What led to the significant growth in the study of DNA after 1977 and why?