Answer:
Prokaryotes are smaller and less developed compared to eukaryotes. Some of them inhabit very primitive environments that resemble earth’s early stages. Endosymbiotic theory states that eukaryotes arose by the endosymbiosis of prokaryotes.
Explanation
By endosymbiont theory, eukaryotic cells arise from prokaryotic cells. Here, the theory shows that eukaryotic ancestors lived in close association with prokaryotes, wherein in some cases, prokaryotes have been engulfed and might have lived inside eukaryotes.
Upon being engulfed by a host cell as undigested prey, these prokaryotes could have been internal parasites of the eukaryotes. But, later on, their relationship becomes mutualistic and these prokaryotes become incorporated as organelles, such as in the case of chloroplasts and mitochondria, which were previously separate prokaryotes
______________________________________
Prokaryotic cells probably appeared before eukaryotic cells because they are less complex.
What is evolution?Evolution means descendence with modification, which can be defined as a consequence of natural selection.
Evolution is therefore a process in which less complex organisms give rise to more complex species.
In conclusion, prokaryotic cells probably appeared before eukaryotic cells because they are less complex.
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Explain with reference to diffusion how sharks are able to smell blood in water?
exerts its effects primarily upon the reproductive organs.
Answer:
The follicle-stimulating hormone (FSH) exerts its effect primarily on the reproductive...
What is responsible for the increased stability of dna compared to rna?.
Answer:
What is responsible for the increased stability of DNA compared to RNA? DNA is a more stable molecule than RNA because it lacks a hydroxyl group on the 2' carbon and is therefore more resistant to cleavage, and because the two sugar-phosphate backbones are held together by many hydrogen bonds between nitrogenous bases
Explanation:
What types of actions are controlled by skeletal muscles.
A key point in Darwin’s explanation of evolution is that
Answer:
The four key points of Darwin's Theory of Evolution are: individuals of a species are not identical; traits are passed from generation to generation; more offspring are born than can survive; and only the survivors of the competition for resources will reproduce.
Explanation:
12. Scientists have observed that the same gene may produce several different mRNA molecules. How could the researcher's model show this variety of mRNA molecules? Identify the stage that introduces this variety.
Answer:
The stage of introns being removed then exons splicing together can create a variety of tRNA molecules. It's like recycling
mRNA is the messenger RNA associated with the transfer of information and is also associated with protein synthesis. In the given scenario, the stages of introns are removed then exon splicing together can create tRNA variety.
What are introns and exons?Introns and exons are the sequences of nucleotides in the genes.
Exons are coding regions of DNA sequences corresponding to protein, while introns are the RNA or DNA found between the exons.
Scientists have observed that the same gene may produce several different mRNA molecules stages of introns are removed then exon splicing together can create tRNA variety to show the variety of mRNA molecules.
Thus, it is the stage that introduces the mRNA molecule variety.
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What 3 things do plants need to make food?
Answer: carbon dioxide, water and sunlight
Explanation: you’re welcome
Answer:
water, carbon dioxide, energy
average height / slope of a strata volcanoe
Answer:
hello there
Explanation:
The average slope heading up the sides of the volcano are ~25 percent with a maximum of 63 percent in the steepest bits. From the "base" level of ~3500 meters (11,400 feet) to the summit you gain 1635 meters (~5,300 feet).
What is the experimental basis for concluding that DNA replicates semiconservatively in both bacteria and eukaryotes
Producers, such as those that make the foods that are shown below, make glucose during the process of photosynthesis.
A produce stand of vegetables such as carrots and peppers.
Where in the cell is the glucose produced?
in mitochondria
in chloroplasts
in cytoplasm
in water
Producers produce glucose in the chloroplast
What are Chloroplasts?The chloroplast is a small, elliptic shape, and membrane-bound organelle found in the cells of most green plants.
The chloroplast contains green substances known as chlorophyll. The chlorophyll is responsible for absorbing radiant energy from the sun for the process of photosynthesis.
Both the light-dependent and light-independent reactions take place in the chloroplast.
Thus, the production of glucose which is a light-independent reaction takes place in the chloroplast.
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Answer:
The in chloroplasts
3. Which statement would be true of a membrane-bound protein that works in conjunction with a sodium–potassium pump during secondary active transport?
It will block a small molecule from moving across the cell membrane in response to an increase in concentration of an ion in the external environment.
It will be able to transport an ion in both directions across the cell membrane and a small molecule in one direction.
Its conformation will change when both an ion and a small molecule bind to it.
It will move a small molecule across the cell membrane in response to a build-up in concentration of the molecule in the external environment.
Answer:
i
Explanation:
Which part of the digestive system is primarily involved in absorbing nutrients?.
Answer:
The small intestine.
Explanation:
The small intestine, made up of three parts (duodenum, jejunum, and iluem), is responsible for dissolving foods and absorbing nutrients through the use of special enzymes.
The organelle which controls cellular activity is the.
the Nucleus
Explanation:
Known as the cell's “command center,” the nucleus is a large organelle that stores the cell's DNA (deoxyribonucleic acid). The nucleus controls all of the cell's activities, such as growth and metabolism, using the DNA's genetic information.
Some males have an abnormal karyotype consisting of 47 chromosomes with an extra Y chromosome. This condition is most likely caused by
Answer:
from parental nondisjunction during meiosis
Explanation:
Parental nondisjunction during meiosis results in an extra Y chromosome, which is called the XYY syndrome, it usually occurs among infertile men.
Select the functions of carbohydrates.
A. immediate energy source.
B. structural components of organisms
C. catalysts in chemical reactions
D. storage molecules for hereditary information
The functions of carbohydrates include: A, B, and D.
Functions of CarbohydratesThe primary function of carbohydrate is, it serves as energy source for the body.Also, carbohydrates form part of the essential structural components of organism and is needed for building macromolecules.Carbohydrates are also part of the structure of nucleic acids which serve as storage for hereditary information.Therefore, the functions of carbohydrates include: A, B, and D.
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What would happen to the dandelion siphonophore population if the tube anemone population increased?
What is the overall net gain of ATP in aerobic respiration per one molecule of glucose? between 0-10 between 10-20 between 30-40 between 40-50.
Answer:
C. 30 -40
Explanation:
90% edge
Hope this helps! have a wonderful day
A.
A-photosynthesis, B-transpiration
B.
A-transpiration, B-excretion
C.
A-respiration, B-photosynthesis
D.
A-excretion, B-respiration
Answer:
C. A-respiration, B-photosynthesis
Explanation:
This is your answer because...
C02 is Carbon Dioxide and H20 is water, and Carbon Dioxide comes out when the animal is breathing (respiratory process) and H20 comes out as urine.H2O + 02 + C6 + H12 + 06 IS things that comes out of a PLANT while it's performing Photosynthesis.H20 is water 02 is OxygenI don't know what the other 3 are, but they HAVE to be glucose.Thanks! Have an AWESOME day!
What happens when the hypertonic 20% sucrose is added to the cells?
Which structure is the site of the synthesis of proteins destined for export from the cell?.
Rough endoplasmic reticulum is the site of the synthesis of proteins destined for export from the cell.
Answer:
hello there
Explanation:
rough endoplasmic reticulum
Proteins that will be exported, or secreted, from the cell, are generally produced in the rough endoplasmic reticulum (rough ER).
Energy-rich molecules that organisms use to carry out daily activities are:.
The objectives are attached to what part of the microscope?.
The revolving nose piece
For a heterozygote, production of sufficient quantities of the functional protein by the ______ allele compensates for the production of a non-functional protein by the ______ allele.
For a heterozygote, the production of the protein by the DOMINANT allele compensates for the production of a non-functional protein by the RECESSIVE allele. It is classical genetics.
Alleles and dominanceAn allele is a gene variant, diploid individuals inherit two different alleles for a given gene locus.
A homo-zygous individual has the same alleles, whereas a heterozygous individual has two different alleles for a given gene locus.
Dominance occurs when the dominant allele completely masks the expression of the recessive allele.
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What organ of the body is the first to receive the nutrients after they pass through the gi tract, and then prepares those nutrients for use in the body?.
Answer: The small intestine
Explanation:the small intestine absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use.
It should be noted that the organ of the body is the first to receive the nutrients after they pass through the gi tract, is small intestine.
What is small intestine?small intestine can be regarded as an organ in the gastrointestinal tract and its this organ that enable absorption of nutrients from food takes place. and then prepares those nutrients for use in the body.
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A car travels 300 km in 6 hours. What's the average speed of the car? O 50 km/h O 65 km/h O 45 km/h O 75 km/h
Answer:
50 km/h
Explanation:
The average speed of the car is essentially the same thing as the unit rate.
Here a car goes 300 km for every 6 hours. To find the unit rate, we must find how many kilometers it goes per hour.
To do so, we can divide 300 by 6 to get a total of 50km/h.
As an example of hormonal communication, when osmoreceptors of the _______________ detect dehydration, a signal to the posterior pituitary gland causes the release of _________________.
Osmorecepters are found in the hypothalamus and causes the release of ADH to increase reabsorption of water back into the blood.
Why do land breezes occur at night?
Answer:
Land breezes usually occur at night because during the day the sun will heat land surfaces, but only to a depth of a few inches.
Explanation:
As the temperature of the land surfaces cool, the warm air rises and creates a small area of high pressure near the land surface.
Look back at figure 1 in the slide show, name 2 nonliving things you see and explain why the organisms of that habitat need them.
Answer:
Water and Sun
Explanation:
The organisms of this ecosystem need water and sunlight to grow and function. Without the water and sunlight, the plants would be unable to grow, therefore herbivores would be without food, impacting the carnivore population.
please help quickly!!!!
Answer:
I'm not quit sure what that is
Explanation:
As a sound wave travels, what happens to the particles in the medium it travels through
Answer:
Sound waves move through a medium by means of particle-to-particle interaction. The source disturbs the immediately surrounding particles, causing them to vibrate about their fixed position at the same frequency as the source.
-Hope that helps<3
Answer:
Sound waves move through a medium by means of particle-to-particle interaction. The source disturbs the immediately surrounding particles, causing them to vibrate about their fixed position at the same frequency as the source.
Explanation:
