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kvv77 [185]
2 years ago
13

When there are not enough available nutrients to support bacterial growth, some bacteria survive by

Biology
1 answer:
Genrish500 [490]2 years ago
6 0

Answer:I’m not sure but I think it is the last one

Explanation:

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How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater?
saw5 [17]

Correct answer: B). With fewer contractions


The main function of a contractile vacuole is to maintain the sufficient amount of water in the protoplasm of the cell. For the freshwater amoeba contractile vacuole is needed to pump water and maintain a osmoregulation.

But when it is kept in sea water, more contraction is required to expel the water out of the cell in order to make the environment inside amoeba same as of sea water.






6 0
3 years ago
Read 2 more answers
The “Food Factories” in plant cells are called
Rufina [12.5K]

In most plants, the leaves are the main food factories. They capture the sun's energy with the help of chlorophyll in the leaf cells. The chlorophyll traps and packages the energy from the light of the sun in a process called photosynthesis. Leaves usually have a large surface so they can collect the most sunlight.

4 0
3 years ago
Which of the following are part of the chemiosmotic coupling model? Protons are pumped out of the mitochondrial matrix into the
Lina20 [59]

The correct answer is: Protons are pumped out of the mitochondrial matrix into the intermembrane space

Chemiosmosis can be described as movement of ions across a selectively permeable membrane, down their electrochemical gradient. It occurs during the cellular respiration within mitochondria and it is involved in ATP synthesis (oxidative phosphorylation via ATP synthase).

Electrons from electron carriers (NADH and FADH) donate electrons to the electron transport chain and that causes changes in protein complexes of electron transport chain. As a consequence, protein complexes pump H+ across a selectively permeable cell membrane from the mitochondrial matrix into the intermembrane space of mitochondria.  

H+ can only get back and pass through the inner mitochondrial membrane with the help of ATP synthase (down their electrochemical gradient). ATP synthase turned by the force of the H+ diffusing through it forms ATP by adding a phosphate to ADP.

4 0
3 years ago
What does the cell nucleus contain?
Ulleksa [173]

A nucleus cell contains chromosomes among other things.

6 0
2 years ago
Which describes the 23 pairs of human chromosomes?
Zigmanuir [339]

Answer:

option B

Explanation:

there are 22 pair of autosome and 2 pair of sex chromosome

3 0
3 years ago
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