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RSB [31]
3 years ago
5

Biological membranes are said to be selectively permeable. What does this term mean, and how does this affect the way the molecu

les are able to move through cellular membranes?
Biology
1 answer:
valina [46]3 years ago
5 0

Answer:

This means that some cells are able to letter molecules pass through them and this makes it easier for the molecules to pass through.

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If all green plants in the world were distroyed which atmospheric gas will increase
Mila [183]

 Trees are a crucial part of the<span> carbon cycle</span>, a global process in which carbon dioxide constantly circulates through the atmosphere into organism and back again. Carbon is the second most valuable element to life, you know, after water. Anyway, trees take carbon from the atmosphere through <span>photosynthesis </span>in order to make energy. This carbon is then either transferred into oxygen and released into the air by <span>respiration </span>or is stored inside the trees until they decompose into the soil. Therefore, the absence of trees would result in significantly HIGHER amounts of carbon dioxide in the air and LOWER amounts of oxygen! The filthy air would also be full of airborne particles andpollutants like carbon monoxide, sulfur dioxide and nitrogen dioxide and its temperature may increase by up to 12 F.


8 0
3 years ago
A friend who is not taking your Biology course fills a cup with ice and then a drink. The friend asks you why the ice in the cup
slega [8]

Answer:

the molecules are farther apart in ice than in liquid water.

Explanation:

The correct answer would be that<u> the molecules of water are farther apart in ice than in liquid water.</u>

<em>Water molecules in ice form are usually less dense than water molecules in liquid form. The water molecules in ice usually arrange themselves in a lattice form, unlike the random form in liquid water. This arrangement makes water molecules in ice to be more evenly spread out than in their liquid counterpart. Thus, ice is usually less dense than liquid water and will obey the principle of flotation by floating on water. </em>

4 0
3 years ago
How can a calendar year help us to understand the magnitude of geologic time
Marina86 [1]

Answer:

The civil year allows us to have an idea of how long our planet has existed.

Explanation:

Calendar year is the 12-month period that corresponds to 365 days of the year, counting from 1 January to 31 December. Geological time, in turn, refers to the didactic organization of the evolution of planet Earth and the forms of life that inhabit or inhabited it. It is an instrument used by Earth's geologists and scientists to analyze and chronologically categorize (through the concept of a civil year) the natural evolution of the world in which we live, in order to better understand its past.

The civil year allows geological time to expose the number of years and days that planet Earth (and its forms of life) are in existence.

7 0
3 years ago
Which organelle acts as storage for food, water, waste, and other materials needed by the cell?
lidiya [134]
The vacuole usually acts as storage for materials needed by the cell. 
6 0
3 years ago
Fill in the blank: When you paddle a boat in the water. the force of your paddle will push the water which will apply an equal f
tatiyna

Answer:

<u>frictional</u>

Explanation:

This scenario follows Newton's third law of motion which alludes to the fact that for every force or action exerted by a person on a body there is an equal and opposite reaction exerted back.

Because there is a limited frictional force (a force exerted by an object when an object moves across it) between

  • the canoe and
  • water surface (the opposite force/reaction)

Here, the paddle helps the boatman apply a force on the water, resulting in the opposite amount of force been sent back; pushing the boat forward.

6 0
2 years ago
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