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Rama09 [41]
2 years ago
12

NEED HELP!!!

Biology
1 answer:
Thepotemich [5.8K]2 years ago
7 0
A. Mass extinction is the answer
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Why does water move through a membrane?
AnnZ [28]

Answer:

The cells need water to maintain their metabolic functions, the way water enters through cells membranes is by osmosis.

Explanation:

The cell membrane is a lipidic bilayer composed of phospholipids and embedded proteins. Phospholipids have the characteristic of being amphiphilic which means that possess hydrophilic and lipophilic characteristics. The most common way is by osmosis, that is a mechanism that moves water from high concentration to less concentration of water.  In the cell membrane, there are is channels of proteins called aquaporins that facilitate the pass of water through the membrane. Also, as water is a very small molecule without charge, this characteristic allows passing a limit amount of water molecules through the hydrophilic characteristic of membranes.

7 0
3 years ago
The rate of a reaction catalyzed by an enzymes usually ________ with temperature; however, at temperatures above the optimum ran
oksano4ka [1.4K]

Answer:

increases; protein denaturation occurs

Explanation:

One of the characteristic of enzymes is the sensitivity to temperature .

Enzymes are sensitive to the changes in the environmental temperature.The enzymatic activities increases with increase in temperature,up to the optimum of 37 degrees in most animals.

However,once the optimum temperature has been exceeded,enzyme activities drops.This is because below optimum the rate of collision between the enzyme active sites and substrate molecules is very high,therefore more products are formed which increases the rate of reactions.

At temperature above the optimum,the high temperature  breaks the bonds,especially the hydrogen bonds holding the 3D structure of the active sites.Therefore,substrate molecules can not fit into the active site,and therefore enzymatic actives of the enzyme is affected,and the enzyme is said to be  denatured

4 0
3 years ago
Doug plants a few peas. After two days, he sees the shoot and the root forming. He observes that the shoot grows upward, toward
UkoKoshka [18]
I would say B) <span>The shoot is positively phototropic and negatively gravitropic; the root is positively gravitropic and negatively phototropic.

This is because the shoot of the plant is attracted towards the sun, as the chloroplasts in the leaves need sunlight to make food. As well, the roots are attracted downward to absorb more water and minerals from the sun.

</span>
4 0
3 years ago
Will mark as brainiest!
goldfiish [28.3K]

Answer:

mono single

macro large

three tri

water hydro

two di

poly many

saccharide sugar

Explanation:

8 0
3 years ago
Enzymes tend to not work in extremely hot temperature because?
xxMikexx [17]

Answer:

C

Explanation:

5 0
2 years ago
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