Biology, 16.12.2019 04:31 dreyes439

Which cell process will move substances against a concentration gradient?

a. active transport
b. osmosis
c. diffusion
d. facilitated diffusion

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Answer from: jacqueline398

Option A) Active transport.

Explanation: Active transport - Movement of molecules or ions from a lower concentration to a region of higher concentration(against a concentration gradient), by the use of enzymes and consuming energy(ATP), hence the substances move across plasma membrane against a concentration gradient. Osmosis is the process in which molecules of the solvent passes through a semipermeable membrane(plasma membrane in case of cell) from a less concentrated solution to more concentrated one along the concentrated gradient. Energy is not required in this process and hence it is passive process. Diffusion is the movement of the molecules of a material from higher concentration to lower concentration.Facilitated diffusion is similar to diffusion, it the transport of substances across a biological membrane from an area of higher concentration to an area of lower concentration by the help of a carrier molecule.

Result: Active transport happens against a concentration gradient.

Answer from: Quest

the awnser is d i think

Answer from: Quest

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports the evolution of earth due to chemical weathering.

hope it !

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Which cell process will move substances against a concentration gradient?

a. active tr...