1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lorasvet [3.4K]
3 years ago
12

Which of the following best supports the endosymbiont theory that present-day eukaryotic cells are descendants of a successful s

ymbiotic relationship between a host cell and an engulfed prokaryote?
A. Chloroplasts and mitochondria replicate in a similar manner as some prokaryotes.
B. Chloroplasts are necessary for photosynthesis reactions in plant and bacteria cells.
C. Mitochondria and chloroplasts are able to produce ATP molecules to be used by the cell.
D. Mitochondria use proteins and nutrients produced in other regions of the eukaryotic cell.
Biology
1 answer:
Klio2033 [76]3 years ago
6 0

Answer:

A. Chloroplasts and mitochondria replicate in a similar manner as some prokaryotes

Explanation:

Endosymbiont theory deals with how eukaryotic organisms were formed from prokaryotic organisms. Prokaryotes such as Bacteria were documented as the first form of life on earth through fossil records before eukaryotes came into light.

Organelles such as Chloroplasts and mitochondria replicate in a similar manner as some prokaryotes. This supports the endosymbiont theory that present-day eukaryotic cells are descendants of a successful symbiotic relationship between a host cell and an engulfed prokaryote

You might be interested in
You made a "cell" using dialysis tubing and a concentrated sugar solution tinted red. You then placed the cell in distilled wate
Mrrafil [7]

Answer:

When the cell has 0% sucrose I expect the cell to stay the same.

Explanation:

First of all, this question should not be confused for the statement "When the "cell" has 0% sucrose, did you expect the cell to have gained water, lost water, or stay the same. In this case, the correct answer would have been; gained water.

But, in this question, we are asked what happens to the cells at 0% sucrose concentration. At 0% (no solute) concentration, there is no net movement of water or solute into or out of the cell, because the cell is isotonic to the external environment (distilled water). Osmosis, a special kind of diffusion, is the movement of water, from areas of lower solute concentration to area of higher solute concentration, or from areas of higher water concentration to areas of lower water concentration through a semi-permeable membrane. If the water moves into the cells (hypertonic cells), then the cell gains water and increases in size, but if the cell loses water (hypotonic cell), then it reduces in size

4 0
3 years ago
What is energy?
Blizzard [7]

Answer:

answer is the ability to do work

7 0
3 years ago
BIOLOGY HELP!!!!!
Vlad [161]

1. The correct answer is pH.

The activity of the enzymes might be affected by environmental changes such as change in pH. Each enzyme has the point when it is the most active and this value is known as the optimum pH. Extremely high or low pH values can lead to loss of enzyme activity and stability.

Phosphofructokinase is sensitive to acidity, meaning that it is inhibited by low pH levels.

2. The correct answer is temperature.

Enzyme is sensitive to the environmental conditions such as temperature changes.

Temperature is a factor that usually increases the rate of enzyme-catalyzed reactions by increasing the activity of enzymes. But, after reaching the optimum temperature, reaction rate abruptly declines. This happens because enzymes are deactivated or denatured at a certain temperature (above 40° C).


8 0
3 years ago
Why are disifectants alone not enough to kill an entire population of bacteria
matrenka [14]
Your answer
More-resistant endospores of themophilic bacteria may survive, but wont germinate and grow under normal storage.
7 0
3 years ago
Covalent bonds are chemical bonds between ions.<br> A. True<br> B. False
Simora [160]

i think it would be

A. True.

7 0
3 years ago
Read 2 more answers
Other questions:
  • By how much did carbon dioxide levels increase from 1980 too 2000
    9·1 answer
  • Why do most land animals share similarities in their body systems?
    6·1 answer
  • Step by step for dealing with a cut from broken glass
    6·2 answers
  • 2. What determines the distribution of plants around<br> the world?
    6·1 answer
  • Angiosperm ______.
    6·2 answers
  • Proteins are made from amino acids. An amino acid has three parts that are joined to a central carbon atom. Identify the three p
    14·2 answers
  • As a scientific concept, race Group of answer choices A. is very significant because it gives us a clearer understanding of huma
    5·1 answer
  • A recipe calls for 34 teaspoon of butter for every 2 cups of milk. If you increase the recipe to use 3 cups of milk, how many te
    9·1 answer
  • Why is altruism a part of pro social behavior
    8·1 answer
  • THIS IS DUE TODAY!please HELP AND ANSWER CORRECTLY
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!