consider the endosymbiont theory and the fact that chloroplasts contain dna molecules. given that chloroplast DNA has genes,

Answers

Answer 1

Answer/Explanation:

The endosymbiotic theory is the idea that eukaryotic cells evolved from the fusion of two prokaryotic cells that formed a symbiotic relationship, with one living inside the other.

An endosymbiont is one organism that lives inside another one.

The existence of mitochondria and chloroplasts, which contain their own DNA and ribosomes, supports this theory. Mitochondria are chloroplasts were once free-living organisms,  they were prokaryotes that ended up inside of other cells.

Mitochondria and chloroplasts have genes that are very similar to the genes of prokaryotes. Their membranes look like the prokaryotic cell membrane, and they divide  in similar ways.


Related Questions

what effect would constriction of the blood vessels have in the body

Answers

Answer:

higher blood pressure

Explanation:

when the vessels constrict they get smaller therefore in order for the blood to be pumped through the body the heart would have to work harder resulting in a higher blood pressure

Answer:

increased blood pressure resulting in risk of heart attack

What is the protozoan and who is the first to observe one?

Answers

Answer:

Protozoa is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris. Anton van Leeuwenhoek was the first person to see protozoa, using microscopes he constructed with simple lenses. Between 1674 and 1716, he described, in addition to free-living protozoa, several parasitic species from animals, and Giardia lamblia from his own stools.

what will most likely happen if the plankton population decreases in this ocean system​

Answers

Answer: The shrimp population would decrease.

Explanation:

Random mutations can occur in an organism's DNA, causing traits that are different from other organisms in that species. Sometimes these mutations can cause problems for the organism, but other times they are beneficial. What is a possible benefit to a random mutation in an organism?

Answers

Answer: It can increase an organism’s chances of surviving

Explanation:

how do eumelanin and pheomelanin affect our skin color?

Answers

Answer:

There are two types of melanin--eumelanin and pheomelanin. In general, the more eumelanin in your skin, the darker your skin will be. People who make more pheomelanin than eumelanin tend to have lighter skin with freckles. Like many other traits, the amount and kind of pigment in your skin is controlled by genes

Explanation:

Annie is herding cattle when one of them gets spooked. What is the likely reaction of the herd? A they will all become agitated B they will not react to a single cow C they will follow the direction of the handler D they will try to protect the spooked cow​

Answers

Answer:

A

Explanation:

Answer:

the answer is D, they will all become agitated

Explanation:

i got it wrong and it showed the correct answer

You are performing an experiment with Primase, using a specific DNA template. In this experiment, you provide NTPs (ATP, UTP, CTP, GTP) which contained only one radioactive phosphate group, in the alpha-phosphate position (the alpha- phosphate is the one attached to the sugar. the other phosphates are beta and gamma). After RNA synthesis occurs, you separate the resultant RNA strand any of the NTPs that have not been incorporated into the RNA, and measure the radioactivity of the newly synthesized RNA.A) In this experiment, would you expect the newly synthesized RNA be radioactive? Explain why.B) If you forgot to add CTP when you did the experiment, would the resulting RNA be radioactive?C) If you did the experiment, with all the NTPs provided, but only the beta phosphate was radioactive for each of the NTPs, would radioactivity be found in the RNA? Explain why.D) If you did the experiment, with all the required NTPs, but only the ATP was radiolabelled Would radioactivity be found in the RNA? Explain why.

Answers

Answer:

(a). Yes.

(b). RNA becomes Radioactive.

(c). No.

(d). It depends. If the gamma phosphate and beta phosphate are not labeled, then the RNA will have certain degree of radioactivity.

Explanation:

So, let us do right into the explanation behind the answers to the questions asked.

(a). The answer to this part of the question is "Yes" because in creating or in the formation of the glycosidic bond, all the alpha phosphate group were taken into consideration that is they were all used, thus making the newly synthesized RNA to be radioactive.

(b). The RNA becomes Radioactive is the answer to this part of this question because CTP is needed in the experiment.

(c). The answer to this part (c) of this question is ''No'' because the only thing that takes part in bonding is the alpha phosphate.

(d). It depends. If the gamma phosphate and beta phosphate are not labeled, then the RNA will have certain degree of radioactivity.

Bill once had a blue car that was in the shop more than it was on the road. Since
then he will not even consider owning a blue car. Bill's aversion to blue cars is
an example of:

Answers

Answer:

artificial made

Explanation:

because it is greated by man not God

Students in a science class visited four local ecosystems. The students observed the species present in each ecosystem and recorded their observations in the table.


Based on these observations, which ecosystem is likely to be the least sustainable?

A.Ecosystem 1, because it has the fewest species
B.Ecosystem 2, because it includes both aquatic and terrestrial species
C.Ecosystem 3, because it has few predators
D.Ecosystem 4, because it supports many animals

Answers

the answer is A

this is because in ecosystem 1 there are only predators and no other species are observed. therefore predators have less food to eat thus they will die of hunger or move to another ecosystem

This is because in ecosystem 1 there are only predators and no other species are observed. therefore predators have less food to eat thus they will die of hunger or move to another ecosystem.

What is Ecosystem?

An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life.

Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity.

Every factor in an ecosystem depends on every other factor, either directly or indirectly. A change in the temperature of an ecosystem will often affect what plants will grow there, for instance.

Therefore, This is because in ecosystem 1 there are only predators and no other species are observed. therefore predators have less food to eat thus they will die of hunger or move to another ecosystem.

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which ligament connects the shaft of the metatarsals

Answers

Answer:

plantar metatarsophalangeal ligament

Explanation:

The plantar metatarsophalangeal ligament attaches proximally from the head of the metatarsal to the base of the phalanx distally. The ligament extends plantarly from the medial tubercle to the lateral tubercle along the plantar surface of the joint.

The ligament that connects the shaft of the metatarsals is :

-Plantar metatarsophalangeal ligament

Metatarsals

The ligament that connects the shaft of the metatarsals is the plantar metatarsophalangeal ligament.

The plantar metatarsophalangeal tendon connects proximally from the head of the metatarsal to the base of the phalanx distally.

The tendon amplifies planarly from the average tubercle to the sidelong tubercle along the plantar surface of the joint.

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What is a pathway for an atom (carbon)

Answers

Answer:

--    --

)____(

Explanation:

The carbon atom can make a transition between photosynthesis and respiration because the carbon atom is both a reactant and a product. For example, plants take in carbon dioxide for photosynthesis which releases oxygen. Then other organisms use this oxygen for respiration, which releases carbon dioxide.n:

When glucose is used as an energy source, the largest amount of ATP is generated by the ___________ of the entire respiratory process.

Answers

Answer:

electron transport chain

Explanation:

it generates the most

Chain is the correct answer

Plzz help!
Which best describes the relationship between two species and a niche?
If two species have the same niche, one species will always become extinct.
Two species are able to occupy the same niche in the same habitat.
Two species cannot occupy the same niche in the same habitat.
If two species have the same niche, one species will always move.

Answers

Answer:

C. Two species cannot occupy the same niche in the same habitat.

Explanation:

just took the quiz

Answer:

C

Explanation:

I did it on edge 2020

Read each question carefully. Write your response in the space provided for each part of each question. Answers must be written out in paragraph form. Outlines, bulleted lists, or diagrams alone are not acceptable and will not be scored.
White blood cells called B cells produce proteins that can be used for the treatment of certain illnesses. However, these B cells do not live for very long on their own. To keep the B cells growing for a long time in laboratories, scientists fuse the B cells with cancer cells (fused B-cancer cells) that do grow for a very long time. The particular cancer cells used for the fusion are treated with chemicals that make them unable to produce the nitrogenous bases adenine and guanine, but the B cells with which they are fused do produce these nitrogenous bases. The scientists grow the large fused B-cancer cells in a growth medium that contains necessary nutrients for the cells and includes a source of carbon.
(a) Describe the role of carbon in biological systems.
(b) The membranes of both B cells and the cancer cells are largely composed of phospholipids. Explain how, when the membranes are fused, the polar parts of the phospholipids from one cell will interact with the phospholipids from the other cell and how the nonpolar parts of the phospholipids from one cell will interact with the phospholipids from the other cell.
(c) Make a claim about the most immediate effect on the fused B-cancer cells if the fused cells are transferred to a growth medium that lacks a source of nitrogen.
(d) Provide reasoning with evidence based on the composition of biological macromolecules to support your claim.

Answers

Answer: they can be ruduce

Explanation:

Identify the "stomach" of the cell that breaks down waste and digests organelles that are not needed​

Answers

Answer:

Lysosomes

Explanation:

A lysosome is an organelle that contains enzymes that break down and digest unneeded cellular components, such as a damaged organelle.

compounds formed from the attraction of oppisitely charged ions are called ________.
A. covalent compounds
B. ionic compounds
C. mineral compounds
D. molecular compounds ​

Answers

Answer:

B. ionic compounds

Explanation:

An energy pyramid is shown below. Which portion of the diagram represents the level with the least available energy?

Answers

Answer:

Explanation:

The top predator. This is because, when energy goes higher on the pyramid, ten percent is taken in by each animal, so less energy is left for each animal.

The energy decreases everytime something higher in the food chain eats it so it would be the predator

Which is an example of a polygenic trait?

Answers

Answer:

Polygenic traits are traits that are controlled by multiple genes instead of just one. The genes that control them may be located near each other or even on separate chromosomes. Some examples of polygenic traits are height, skin color, eye color, and hair color.

Answer:blood type in humans and birth weight calves

Explanation:

List the following structures from largest to smallest: proton pump, nuclear pore, cyt c ribosome,
nucleus.

Answers

Answer:

Nucleus

Nuclear pore

Proton pump

Cyt C Ribosome

Explanation:

The nucleus of the cell is the largest of all of these structures, all of the others are located inside the nucleus of the cell or interact with it, the nuclear pore is a pore in the nucleus that allows the transport of proteins through the membrane, the proton pump passes through the nuclear pore, and a Ribosome is a protein that transports nutrients, so that would be the smallest.

The order from largest to smallest is nucleous>> >> ribosome >> nuclear pore >> proton pump >> Cyt C.

The nucleus is the organelle that contains the genetic material in a eukaryotic cell, whereas ribosomes are protein factories.

The nuclear pore is a  structure that allows the passage of certain molecules between the cytoplasm and the nucleus.

The proton pump is an integral protein-membrane, whereas Cyt C is a mitochondrial protein.

In conclusion, the order from largest to smallest is nucleous>> >> ribosome >> nuclear pore >> proton pump >> Cyt C.

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Explain why the steroid hormone estradiol (MW 272) readily crosses membranes by simple diffusion but the much smaller H requires transport proteins

Answers

Answer:

Estradiol has a higher partition coefficient than H+ ions

Explanation

Estradiol is a non-polar and hydrophobic molecule that has a higher partition coefficient than H+ ions, it means that the cell membrane is more permeable to this molecule because it can dissolve in and diffuse within the hydrophobic phase of the membrane. The movement of polar charged molecules (even small H+ ions) requires the input of energy to be able to dissolve within the lipid bilayer. In consequence, the movement of H+ ions requires proteins capable of transporting these protons through the membrane.

SELECT ALL THAT APPLY. Which two elements make up the water cycle?*
2 points
Carbon
Sulfer
Nitrogen
Gold
Phosphorus
Hydrogen
Oxygen
Helium
This is a required question

Answers

Answer:

Maybe

hydrogen and oxygen

which fungi has single cell​

Answers

Yeasts are known as single celled fungi. Around 1,500 species of fungi are recognised as yeasts.

helpppppppppppppppppppppppppp

Answers

Answer: B

Explanation:

As the temperature rises, the graph shows that the solubility increases

PLEASE HELP !!!!!!! WILL MARK BRAINLYEST

What was the objective of the pringle lab study?

A) to determine where the different antelope species spent most of their time


B) to track the migration routes of the different antelope species


C) to determine how so many similar species of large mammals can exist together in the same place


D) to determine what species of animals the lions ate

Answers

Explanation:

Im not sure, but I think C)

Can you describe what you did in the lab?

10. What changes during a chemical reaction between two compounds?
A. number of atoms
B. chemical bonds
C. total mass
D. total energy

Answers

Answer:

I think it's chemical bonds I'm not of that helped

The changes occurs in chemical bond during a chemical reaction between two compounds. The correct option is B.

What is chemical bond?

A chemical bond is a long-lasting point of attraction among atoms, ions, or molecules which then allows chemical compounds to form.

Ionic bonds are formed by the electrostatic force between oppositely charged ions, whereas covalent bonds are formed by the sharing of electrons.

A covalent bond is the strongest bond in chemistry. In such bonding, each atom shares electrons that bind them together.

The bonds that hold molecules together break apart and form new bonds during chemical reactions, rearranging atoms into different substances.

Each bond requires a different amount of energy to break or form; without this energy, the reaction cannot occur, and the reactants remain unchanged.

Thus, the correct option is B.

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From what age are the earliest discovered paintings of swimmers?

Answers

Answer:

The paintings are estimated to have been created during the Neolithic 8,000 years ago.

True or false?
Density is equal to the mass of an object divided by its volume.

Answers

Answer:

True

Explanation:

The formula for density is

p = m/v

density = mass ÷ volume

When substances are constantly moving
back and forth across a cell membrane, the
cell is said to be in a state of?

Answers

The diffusion of water molecules a secectlvely permeable membran.

The diffusion of water molecules a secectively permeable membrane.

What is Diffusion?

The net passive movement of molecules or particles from areas of higher concentration to areas of lower concentration is known as diffusion. There needs to be a concentration gradient for diffusion to happen.

The dissimilarity in the quantity of solutes, particles, or molecules between the two locations will drive them to travel between the two regions.

The gradient created by the uneven particle concentration between two fluids will cause the particles to move in order to balance the discrepancy in concentrations. However, solutes do not migrate in a single direction during the diffusion process.

Therefore, The diffusion of water molecules a selectively permeable membrane.

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Why does photosynthesis occur at the upper surface of the leaf than the lower surface

Answers

Answer: The sunlight hits the upper surface of the leaf, and sunlight is crucial to the photosynthesis process. The leaves trap the energy and use it to create glucose.

Which of the following is not one of the three steps (processes) involved in urine formation?

Answers

The following is not one of the three steps (processes) involved in urine formation - Erythropoietin production.

Erythropoietin

It is a hormone that has no role in urine production. The steps of urine production are:

glomerular filtration - the filtration of blood, which is carried out by the glomerulus tubular reabsorption - The tubular epithelial cells in different segments of the nephron perform absorption (reabsorption) either by active or passive mechanismstubular secretion - helps in the maintenance of an ionic and acid-base balance of body fluids.

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