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ki77a [65]
3 years ago
6

When does the cell have to use active transport?

Biology
2 answers:
xxMikexx [17]3 years ago
7 0
The answer is to move molecules across the membrane against a gradient.
VikaD [51]3 years ago
3 0

Answer:

The correct answer is option D. "to move molecules across the membrane against a gradient".

Explanation:

Active transport in cellular biology takes place when a cell has to move molecules or ions across the membrane from a region of lower concentration to a region of higher concentration. The cells needs to consume energy for this type of transport, which contrast with passive transport, at which the transport is in favor of the gradient and no energy input is needed.

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At what temperature does all molecular motion stop?
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Answer:

Absolute Zero

Explanation:

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It wouldn't be 0 degrees C or 0 degrees F because the temp of the molecular motion stop in Celsius is -273.15 degrees and in Fahrenheit it would be -459.67 degrees.

I hope this helps :)

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2 years ago
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attashe74 [19]

Answer:

hope that helps?

Explanation:

A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional graph of the function f(x, y) parallel to the (x, y)-plane. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines.

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2 years ago
List The properties of S waves and P waves
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AlekseyPX

The gastrointestinal wall is composed of four layers or tunics:

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To learn more about mucosa click here

brainly.com/question/13153021

#SPJ4

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