<u>Answer:</u>
The correct answer option is: Cell wall.
<u>Explanation:</u>
Cell wall is that plant cell organelle which supports and maintains the cell's shape and protects the cell from the damage.
It is a thick and fibrous structure, made of cellulose, which encloses the cell in it, acting as a boundary between the components of the cell and the external environment.
The cell wall is present in plants, algae, fungi and prokaryotes.
The moon causes the rising and falling of the sea levels because of the gravitational effects.
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Answer: 19,600 N
Weight is a force, and force equals mass times acceleration. So the formula for weight is w = m • g
Messenger RNA
Hope this helps!
The correct answer is: A) The polarity of membrane phospholipids
Factors that affect membrane permeability are
1. Chemicals :
Some of the organic solvents such as chloroform and ethanol can dissolve the membrane and thus, destroy the selective permeability of the membrane.
2. Temperature :
Too high temperatures denature the protein that are in the structure of the membrane destroying its selective permeability. On the other hand, too low temperature slows down molecule movements and the permeability decreases.
3. Cholesterol:
Increases the permeability by reducing the barrier formed by phospholipids’ heads
4. The saturation of hydrocarbon tails in membrane phospholipids:
Saturated fatty acids decrease permeability of the membrane because they get very close together, which makes it harder for the molecules to pass through.
