Answer:
C
Explanation:
According to the endosymbiotic idea, a few eukaryotic cells' organelles were previously prokaryotic microorganisms. Chloroplasts and mitochondria divide by binary fission. Therefore, option (C) is correct.
What is Endosymbiotic Theory ?According to the endosymbiotic theory, eukaryote cell organelles like chloroplasts and mitochondria descended from separate bacteria that eventually developed symbiotic relationships with other cells.
Both mitochondria and chloroplasts have circular, single-stranded DNA in addition to not having histones. Prokaryotes are the only organisms that have single-stranded, circular DNA. They contain their own ribosomes to translate and make proteins. These qualities would enable the mitochondria and chloroplasts to thrive on their own, supporting the endosymbiosis theory.
Therefore, option (C) supports the theory of the endosymbiotic origin of chloroplasts.
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Certain blood vessels that contain specialized sensors that detect the level of internal pressure and transmit messages to the nervous system, which then triggers the smooth muscle in the vessel walls to make any needed size adjustments. These sensors are called: Select one:
The process whereby the earth’s life changes over time through changes in genes of populations of organisms in succeeding generations is called____.a. emigration.b. mutation.c. natural selection.d. evolution.e. genetic drift.
Answer:
The correct answer is option : d. evolution.
Explanation:
Change in the heritable traits or characteristics of population of a organism over time by the adaption or changes in genes of such population over successive generation is known as the evolution.
These changes that cause the evolution of the biological population is caused by the process of adaption through natural selection that is the ability of the passing beneficial genes from parent to offspring.
Thus, the correct answer is option D. evolution.
How do buffers play a role in
homeostasis in living things?
Answer:
Buffers are commonly used in living organisms to help maintain a relatively stable pH.
In biological systems, chemical buffers prevent sharp and sudden changes in pH.
In biology, homeostasis refers to stable conditions required for the survival of organisms.The pH is a scale used to determine how acidic/basic water is. The pH range from 0 to 14 ( a pH equal to 7 is neutral).In human blood normal pH is about 7.35 to 7.45. A sudden change in this value alters and negatively affects the homeostasis of the body.The carbonic acid-bicarbonate is the most important chemical buffer which is used for mantaining acid-base balance (homeostasis) in the blood.The blood pH can change due to respiratory acidosis/alkalosis and metabolic acidosis/alkalosis.In conclusion, chemical buffers prevent sharp and sudden changes in pH.
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Shivering and vasoconstriction would be signaled to cause a: A. increase in pH. B. decrease in temperature. C. decrease in pH. D. increase in temperature.
Answer:D
Explanation: shivering occurs when someone is cold and vasoconstriction is when the blood vessels close to the skin and the veins closer to the skin surface constrict as a result of dat air doesn’t enter the body
Vasoconstriction is the narrowing of the blood vessels that hinders blood flow. Vasoconstriction and shivering will lead to an increase in the temperature through thermoregulation. Thus, option d is correct.
What is thermoregulation?Thermoregulation is the maintenance and balancing of the temperature and heat in the body. They are regulated by many factors including shivering and vasoconstriction.
During the vasoconstriction, the blood vessels close to the skin surface close and the body shivers as a result of cold or decreased temperature. This signals the body to increase the temperature so that shivering can be stopped.
Therefore, vasoconstriction and shivering signal the body to increase the temperature.
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A scientist wants to test how a species of insect reacts to changes in its
environment. She puts the insect in a container and leaves it outside
overnight. Which is the dependent, rather than independent, variable in this
experiment?
O A. The amount of light available to the insect
O B. The dew that collects for the insect to drink
O C. The behavior of the insect in the container
O D. The change in temperature as the sun goes down
Answer:
C is the correct answer
Explanation:
punnet squares are a useful tool in genetic studies. Which of the following describes the most likely use of this tool?
a. To quantify proportions of offspring with polygenetic traits
b. To determine the genotypic ratios of crosses
c. To determine frequencies of recombination
d. to measure phenotypic variability
Answer:
B
Explanation:
To determine the genotypic ratios of crosses
6.Explain how animals in Vertebrata are classified into further subgroups.
Answer:
Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals
Which feature forms when magma cools beneath earths surface?
Answer:
batholiths
Explanation:
just got it right
Answer: C. Batholiths
PLEASE HELP!! What are the limitations of sending information using electromagnetic waves?
Answer:
Explanation:
he limitations of sending information using electromagnetic waves is that when the electromagnetic waves move outward in all directions, wave transmitters need to be focused to transmit their signals to a single specified location.
What happens when volcanoes release greenhouse gases into the atmosphere?
Answer:
a. the climate gets warmer...
Explanation:
When volcanoes release greenhouse gases into the atmosphere, global warming is due to the greenhouse effect.
What do you mean by the Greenhouse effect?The Greenhouse effect may be defined as the phenomenon of keeping the earth warm due to the presence of certain gases in the atmosphere.
Greenhouse gases like carbon dioxide, Methane, and Nitrous oxide allow the solar radiations to enter but prevent the escape of heat radiations of longer wavelength.
Due to this, the gradual and continuous increase in the average temperature of the earth's surface occurs, a phenomenon known as global warming.
Therefore, when volcanoes release greenhouse gases into the atmosphere, global warming is due to the greenhouse effect.
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Without the discovery of magnetic reversals recorded on the ocean floor, scientists
A. could not confirm the usefulness of sonar
B. could destroy the hypothasis of continental drift
C. could not provide a mechanism for moving continents
D. could explain how the seafloor was being destroyed
Answer:
C. could not provide a mechanism for moving continents
Explanation:
Magnetic reversals have the habit of causing geological displacements, since they are directly linked to the movements and distribution of tectonic plates on the planet, which are responsible for the movements of the continents. In this case,
if the discovery of magnetic reversals recorded on the ocean floor were not carried out, it would be impossible to establish its relationship with the movement of the tectonic plates, making it impossible to provide a mechanism for moving continents.
What is absorption?
A. getting rid of the parts of the food that the body couldn't
use
B. absorbing nutrients into the blood stream from the food
that was eaten
C. the breaking down of the food that has entered the body
D. putting food and drinks into your body
Answer:
option(B)
Explanation:
Absorbing nutrients into the blood stream from the food that was eaten is called absorption.
write one ecological importance of mucor.
mucor is a microorganism!
Answer:
I actually I understand but I can try I would give three importance I no
Explanation:
1)It can be used in producing ethanol
2) It has a large array of sugar and can be used as a food source
3) It is also used as fish feed and maybe a valuable tool to clean oil spills
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please answer the question
Answer:
two of the DNA fingerprint are same when they contain the same nitrogenous bases in the same location of the DNA.
Explanation:
The DNA fingerprint is one of the most important tool as a forensic medicine expert to to form such condition and rule it out to come to a diagnosis.
DNA fingerprint uses the base pair which a different for all the other human beings. Due to this from the blood or other cells of the body there can be an evidence of the person and this is usually done on a comparative basis.
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I high statement best describes the scientist who contributed to our current body of scientific knowledge
Answer:
See the answer below
Explanation:
First, it may seem that the question is with a typographical error. I guess you wanted to ask, "Which statement best describes the scientist who contributed to our current body of scientific knowledge?"
To answer the question, anyone that has engaged in research following the established scientific method and was able to report the findings from the research by publishing it in a recognized journal has contributed to our current body of scientific knowledge.
In this regard, men and women of all races, through time have contributed to our current body of scientific knowledge.
structure of leaf is complementary to its function explain
Answer:
All leaves have the same basic structure - a midrib, an edge, veins and a petiole. The main function of a leaf is to carry out photosynthesis, which provides the plant with the food it needs to survive. Plants provide food for all life on the planet.
Explanation:
Which of the following is an example of a consumer? Tree Sun Rabbit Mushroom
Which latitude lines does photoperiodism have the greatest effect? Why?
Answer: A short-day plant will not flower if light is turned on for a few minutes in the middle of the night and a long-day plant can flower if exposed to more red-light in the middle of the night. Cryptochromes are another type of photoreceptor that is important in photoperiodism. Cryptochromes absorb blue light and UV-A.
Explanation:
The intensification of ultraviolet rays has contributed to
Answer:
skin cancer,sunburn,accelerated skin aging etc.
Explanation:
The severity of the effect depends on wavelength,intensity and duration of exposure.
Answer:
increase in skin cancer. please give brainly!
Explanation:
How are plants adapted to increase the amount of water and carbon dioxide they absorb?
what is meant by photosynthesis
Answer:
Photosynthesis is a physio-chemical process by which green plants use light energy to drive the synthesis of organic compounds. It is an enzyme regulated anabolic process.
Explanation:
Answer:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. ... This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.
Which of the following cell membranes is the most fluid?
Membrane A, because it is composed of saturated fatty acids that have one or more cis bonds that form stable aggregations
Membrane A, because it is composed of saturated fatty acids that lack weak hydrogen bonds that continually break and reform to permit macromolecule movement
Membrane B, because is it composed of unsaturated fatty acids that form weak covalent bonds at the site of their cis bonds, which permit easy movement
Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing
Answer:
Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing.
Endometriosis occurs when endometrial tissue, which normally grows inside the uterus, grows outside the uterus. Based on the model, what effects would you expect these growths to have on the female reproductive system and on fertility?
Answer:
Endometrosis could negatively affect the probability of gestating an embryo if they are growing inward. The affection of the fallopian tubes and the uterus could alter the implantation or even generate complications for the embryo during pregnancy.
In addition, endometriosis generates painful conditions in the abdominal area to the point that it is considered as menstrual cramps during menstruation, women who suffer from this disease suffer a lot during the menstrual cycle.
Regarding the reproductive system, those female reproductive systems that suffer from this disease are considered potentially malignant, since many malignant neoplasms are incited to appear in these foci of excessive proliferation of the endometrium.
Explanation:
Endometriosis can affect the walls of the fallopian tube and the uterus, since it occurs in the endometrium, that is why it bears that name.
The macroscopic appearance of this lesion at the histological level is a tumor nodule, since they are proliferative foci.
Answer:
abnormal tissue growing on the ovaries might affect ovulation, making it harder or impossible for women to get pregnant. The extra tissue may cause pain, since the tissue is growing in places it is not meant to be growing
Explanation:
answer from plato
for edmentum
How
might a sinus infection affect the rest of the respiratory system?
Answer:
The inability of the sinuses to drain and the associated lack of airflow create an environment that is ideal for bacterial growth. In acute viral sinusitis, the virus that caused the upper respiratory infection has infected the sinuses and continues to produce mucus, inflammation, and congestion.
Drag each label to the correct location. Classify the interactions as being direct or indirect competition. Two eagles fight over a salmon carcass. All the gray foxes in a habitat prey primarily on penguins. Two colonies of black ants clash over a wasp. Gray squirrels in an area rely on nuts for food.
Answer:
Two eagles fight over a salmon carcass- DIRECT
All the gray foxes in a habitat prey primarily on penguins- INDIRECT
Two colonies of black ants clash over a wasp- DIRECT
Gray squirrels in an area rely on nuts for food- INDIRECT
Explanation:
Living organisms of same or different species tend to interact with one another in their natural habitat. One of those interactions is competition, which occurs when living organisms share the same limited resources or occupy the same niche in their habitat.
However, competitive interaction between organisms can either be direct or indirect. Direct interaction is that which involves a physical interaction between the organisms i.e. a confrontation. A struggling for the limited resource is evident. For example, two eagles fighting over a salmon carcass and two colonies of black ants clashing over a wasp shows the form of physical confrontation for the limited resource between the organisms involved. Hence, they are examples of direct competition.
On the other hand, indirect competition involves the competition for a limited resource without a physical confrontation or struggle. Organisms make use of the limited resource until it becomes unavailable to competitors. For example, gray foxes in a habitat that prey primarily on penguins and gray squirrels in an area relying on nuts for food shows a competition for a scarce resource without any physical interaction between them. Hence, they are examples of indirect competition.
B is wrong need help
Answer:
its A i think
Explanation:
trust me bro
Page No. Date What is Cocoon 2 How is it produce
Cocoon, a case produced in the larval stage of certain animals (e.g., butterflies, moths, leeches, earthworms, Turbellaria) for the resting pupal stage (see pupa) in the life cycle. Certain spiders spin a fibrous mass, or cocoon, to cover their eggs.
Why was the Nationalist Party more popular in China’s cities than in the countryside? Wealthy people who supported the party were concentrated in cities. People in the countryside were less active in politics than people in the city. Poor city dwellers hoped the Nationalist Party would bring economic change. The Nationalist Party threatened to end crop trade with Western nations.
Answer:
Wealthy people who supported the party were concentrated in cities.
Explanation:
Answer:
The answer is A on edgeExplanation:
why the women have big hips?
Answer:
Explanation:
During adoloscence, many changes occur in boys as well as girls.
Growing of the hip region is one of the changes in women.
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Metals are useful in industry because they can be shaped without breaking. What is this property of metals called?
Answer:
malleable ................
Answer:
versatility ductility conductivity malleability