Selectively permeable (or semi permeable) means where for example a membrane can choose what material can pass through while others cannot. They control the in and out of materials.
This is because the membrane has tiny spaces, where only smaller molecules can pass through, other larger ones cannot.
Answer: Rrna is a part of ribosome that helps make protein and also links amino acids.
Explanation:
The chance that a certain event will occur is known as its probability.
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As blood pressure increases and the hearts is working harder the most vulnerable arteries area are those <u>Located near the heart, because they are absorbing the most shock.</u>
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Explanation:
When the heart pumps blood, the highest pressure is felt close to the heart. This is why the aorta, the artery that carries blood away from the heart is made up of thick walls to withstand this pressure, otherwise, these vessels would rupture. Away from the heart, this pressure lessens, and the blood vessels are not so thick-walled.
Learn More:
For more on structure of arteries check out
brainly.com/question/2700868
brainly.com/question/1686670
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Answer:
They are usually found in the center and they are called embyro sacs.
Explanation:
