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jeyben [28]
2 years ago
12

Which is an abiotic factor that affects a freshwater ecosystem apex?

Biology
2 answers:
mina [271]2 years ago
8 0
My guess is that fat-soluble toxins that may occur in freshwater ecosystems would most affect apex species in these ecosystems. This is because fat-soluble toxins are stored in the fat reserves of animals, and then bioaccumulate up the food chain. So in this case, most of the toxin is not secreted, but stored within the food chain, and bioaccumulates, with the concentration becoming higher the further up the food chain. 
Solnce55 [7]2 years ago
7 0

Answer:

The amount of light.

Explanation:

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Ira Lisetskai [31]

Answer:

D problematic is this que of answer

6 0
1 year ago
Which of the following structures is NOT found in some prokaryotic cells?
WARRIOR [948]

The answer would be:

Cilium

<u>Here is more about the structures of prokaryotic cells:</u>

Axial filament is a bundle of flagella that are wrapped around the cell's body.

Flagellum is what the prokaryotic cell has that is whip-like in structure. It helps with the motility of the cell.

Pilus is a hair-like structure that are found on the surface of prokaryotic cells. They help the cell attach itself to surfaces.

Peritrichous flagella are several flagella that can be found all over some prokaryotic cells.

7 0
2 years ago
You observed many sand hill cranes on your walk. Two sand hill cranes flapped their wings and hopped up and down when you walked
Anarel [89]

Answer:

This question lacks options, the options are:

A) symbiosis

B) ecosystem

C) community

D) population

E) biosphere

The answer is D) Population

Explanation:

Living organisms in an ecosystem are usually found in numbers living together in a given area. This is termed POPULATION in ecology. A population refers to the group of living organisms that belongs to the same species living together in the same habitat and have the ability to interbreed i.e. mate and reproduce with one another.

This is the case in this question where many sandhill cranes (large flying birds) were observed in a particular area, which represented their habitat. Asides the group of sandhill cranes living together, they were also observed to be interbreeding. This was evident in the observation of two sandhill cranes hopping up and down around their bright orange baby. This shows that members of the population are capable of mating and reproducing fertile offsprings.

This observation completes what a POPULATION is all about, hence, a population was observed.

5 0
2 years ago
Muscle cell activity increases and ATP decreases below the set-point, a sensor molecule detects low ATP and activates protein ki
sergeinik [125]

Answer: Feedback mechanism

Explanation:

Feedback mechanism is the body's way of maintaining physiologic processes in the body. These physiologic processes include maintaining homeostasis, production of energy, hormones as well as enzymes required for chemical reactions.

There are 2 types of feedback mechanism:

  1. Positive feedback: The stimulus (message) sent to the brain, produces prolonged increased production or increased activity in the body.
  2. Negative feedback: In negative feedback, the stimulus causes production, secretion or activity till a set point where the body knows it has taken enough. This causes a self termination of the process.

In the increased muscle activity, the increase in activity in turn causes a decrease in energy (ATP) and serves as the stimulus leading to the release of enzymes which in turn lead to increased absorption of glucose which will be used by the body to produce more ATP needed for the muscular activity. At the end of the muscular activity, the body recognizes that it doesn't need an increased absorption of glucose to support increased activity anymore and glucose absorption normalizes.

7 0
3 years ago
Which of these is a primary food crop?<br><br> A) Hay <br> B) Cocoa <br> C) Cotton <br> D) Rice
Galina-37 [17]
I think it's answer D: Rice. Rice is probably grown more than any other options for food.
8 0
3 years ago
Read 2 more answers
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