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liq [111]
3 years ago
10

What are two reasons why molecules will not diffuse into cells?

Biology
1 answer:
AlekseyPX3 years ago
5 0
Molecules are defined as the smallest particles of a chemical compound or an element, and are made up of atoms. Cells are made up of semi permiable membranes that only allow selected materials to move in or out of the cell, therefore due to the big size of molecules compared to atoms the membrane doesn't allow their passage in the cell. Therefore the cell doesn't allow most molecules to diffuse passively to the cell. Secondly, molecules that can enter the cell requires specific carriers carriers that will enable entry of small molecules in the cell.
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What are the mechanisms of natural selection, and how do they lead to changes in
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Darwin's proposed mechanism for evolution is natural selection. Natural selection allows species to respond to their surroundings through time, or to become progressively excellently-suited. Natural selection is environmentally based and involves established heritable variation within a population.

They lead to changes in  species over time:

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  • In this framework each organism has its own special set of heritable i.e genetic variations from the common ancestor that have slowly developed over very longer periods of time.
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3 years ago
Explain how thing that plants or animals do are done by the work of cells.
ipn [44]
<span>Basically because of the presence of cellular organization and hierarchy which organs are influenced by individual autonomic cells.

The cellular organization relates with one another since the colossal cell, the organ system is fundamentally composed of cells. Cells are the building blocks of these structures and which creates such organ and organ system. They associate as one cell intercommunicates with another cell until all received the message and translates it and sends it with another organ and to cell -vice-versa. And also, they become interdependent with the other cell -other tissue -other organs -other organ system. </span>
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7 0
3 years ago
Muscle contraction that results in a change in joint angle is called
Alex_Xolod [135]
Muscle contraction that results in a change in joint angle is called <span>concentric contraction.
This contraction occurs when enough force that can overcome the resistance applied is developed by the muscle where this force developed is larger than the force of the resistance applied.</span>
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3. What can the reader reasonably conclude based on the information in this passage?
Mashutka [201]

i think answer is D animal in the rain forest

7 0
2 years ago
Read 2 more answers
Help Me With This Question
uysha [10]
A) after 1911 gradual increase in deaths pattern explains that smoking causes cancer !

b) after 2001 , the graph will continue decreasing, because of the steps taken by government, the steps by people itself !! that all helps in decreasing deaths and cancer number after 2001 !
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3 years ago
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