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MariettaO [177]
3 years ago
8

What happens when sand and gravel roll along a river bed?

Biology
1 answer:
Alenkinab [10]3 years ago
8 0
It serves as a barrier to biological activity. 
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This subcellular structure functions to modify gene expression products before they are shuttled out of the cell via exocytosis.
Over [174]

Answer:

The correct answer will be- Golgi apparatus

Explanation:

The proteins are synthesized in the ribosomes whether they are attached to the endoplasmic reticulum or free. These synthesized proteins enter the lumen of the endoplasmic reticulum where they get packaged to go to Golgi apparatus.

The Golgi apparatus is the site of post-translational modification of the secreted proteins like ubiquitination, acetylation, phosphorylation and many others.

Thus, the Golgi apparatus is the correct answer.

5 0
3 years ago
Which of the following would cause gene flow
Zigmanuir [339]
C. Individuals moving into a population, gene flow can also be referred to as gene migration due to this
5 0
3 years ago
Read 2 more answers
Prokaryotic bacteria are surrounded by a ____________ that contains the ____________ to regulate the entry and exit of materials
lukranit [14]

Prokaryotic bacteria are surrounded by a cell membrane that contains the transport proteins to regulate the entry and exit of materials through the cell, the cell wall to help maintain cell shape and structure, and the capsule, which aids against drying out and protects bacteria from a host's immune system.

<h3><u>Explanation:</u></h3>

Bacteria are the prokaryotic organisms that are found in every part of Earth. These organisms do have an interesting ultrastructure. The coverings of the bacteria are three in layer. They are

A. The outer capsule.

B. The middle cell wall.

C. The inner cell membrane.

The capsule is the outermost covering of bacteria that is formed of different slimy materials. These materials contains hygroscopic substances which can absorb water from the surroundings even when the water concentration in outside is very very low. This layer of protection outside bacteria help them to protect themselves against drying out at dry conditions.

The middle cell wall is formed of polymers of N acetyl glucosamine and N acetyl muramic acid. This layer is chitin in nature and is strong enough to maintain the shape and size of bacteria irrespective of outer conditions.

The innermost layer of bacteria is cell membrane which is formed of proteins and lipids bilayer and this cell membrane contains different transport for proteins which help in transport of different substances like water and nutrients inside the cell by means of active transport or passive diffusion.

6 0
3 years ago
Read 2 more answers
What causes gene flow?
Sidana [21]

Answer: b

Explanation:

7 0
3 years ago
Why didn't darwin use mendel's results when formulating his theory of evolution by natural selection?
Naily [24]

Answer;

Mendel's work was not well known until many years after Darwin published his theory of evolution

Explanation;

-Mendel's work was ignored because it was not widely distributed, and he didn't make an effort to promote himself. In actual fact, the reasons are more complex.

-Gregor Mendel had the answer to Darwin's problem. Traits were not blended, but inherited whole. And according to Mendel's laws of inheritance, a trait that might disappear in one generation might reappear in the following generation. Modern Neo-Darwinism combines both Darwin's and Mendel's work.

3 0
3 years ago
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