A sentence for active transport

2 answers:

7 0

Active transport is the movement of a substance, such as glucose, against its concentration. It usually moves from low to high concentration, and through the cell membrane.

dem82 [27]4 years ago

4 0

Active transport is the moving of molecules across the membrane of the cell against the concentration gradient with the use of ATP.

Low to high concentration. Concentration gradient is the diffusion (movement of molecules from regions of low concentration) from high to low with the gradient. Active transport is from low to high, against the gradient.

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A city was intensively sprayed with DDT to control houseflies. The number of houseflies was immediately greatly reduced. Each ye

Anestetic [448]

Answer:

Option D, The DDT killed susceptible flies. The few that were already naturally resistant survived and passed this resistance on to their offspring.

Explanation:

When DDT was sprayed for the first time, some of the house flies which were not capable enough to withstand the adverse effects of DDT , eventually died. And the butterflies that survived through this, were having a natural resistance against DDT. Now, with time these DDT resistant houseflies mated and produced offspring that had genetic trait of resisting DDT by birth. This is the reason, why houseflies after ten years were as abundant as ten years back when the control program was started.

Option D is correct

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Nesterboy [21]

Difusion facilitada is the answer.

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