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anastassius [24]
3 years ago
7

When molecules are very large or are being moved against their concentration gradient, energy is required to move molecules acro

ss a cell membrane. this type of movement is best described as:?
Biology
1 answer:
kozerog [31]3 years ago
4 0
Active transport. Which the molecules are transported by a protein called carrier protein with the help of ATP.
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What 2 types of point mutations will cause a frameshift mutation?
Bas_tet [7]

Answer:

Insertion and deletion

Explanation:

A frameshift mutation is when the entire reading frame of DNA is shifted, and incorrect.

Frameshift mutations can either be caused by insertion or deletion.

When insertion or deletion occur, a nonsense protein will be made.

So, the correct answer is insertion and deletion.

6 0
2 years ago
Suppose the volume of milk in a glass is 230 cubic cm. If 1 gallon of milk equals 3.79 liters, there are how many glasses of mil
balu736 [363]
Volume of milk that a glass can hold = 230 cubic cm
It is already given that
1 gallon of milk = 3.79 liters
W already know
1 liter = 1000 cubic cm
Then
3.79 liters = 1000 * 3.79 cubic cm
                = 3790 cubic cm
Now
Number of glasses needed to contain 230 cm^3 of milk = 1
So
<span>Number of glasses needed to contain 3790 cm^3 of milk = 3790/230
</span>                                                                                           = 16.48
From the above deduction, we can conclude that 17 glasses of milk are required to hold 1 gallon of milk.
4 0
3 years ago
Only 3% of the water on earth is fresh water, the kind we need for drinking and growing food. Of that 3% , how much is locked in
spin [16.1K]

about...69%

or more than two-thirds

4 0
2 years ago
Why did the Vancouver Fraser Port Authority select Maplewood Flats as a restoration area to
oee [108]

Answer:

a. Because it offers the greatest improvement in environmental conditions, sufficient to match the damage caused by CEP, for the least expense.

Explanation:

The businesses are required to restore the land to their original condition once they are with their business activities. The business operations often causes damage to the site and nearby land, for this reason restoration is mandatory in many countries. Vancouver Fraser Port Authority selects Maplewood Flats for the restoration activity because it offers the restoration at cheap cost. This will save company's cost and the land will be to its original condition with least possible damage to environment.

4 0
3 years ago
The bottleneck event that decimated the bison was caused by _______.
Whitepunk [10]
The answer is an overhunting.

<span>The bottleneck event means drastic reduction of the population size because of environment changes. The consequence of this is the reduction of genetic variation. The bison population is a good example of the population bottleneck. The bison population drastically reduced its size due to overhunting which culminated at the end of the 19th century, when bisons almost extinct. </span>
7 0
3 years ago
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