Cyanide is a poison that limits the ability of an animal cell to manufacture atp. in a cell containing a small amount of cyanide, which process would be least affected? a. movementb. cell divisionc. active transportd. diffusion

D. Diffusion

Explanation:

Cyanide is a toxic substance which can poison the metabolic reactions of the organisms. The cyanide act during cellular respiration especially during the electron transport chain by blocking the transfer of an electron to the oxygen. This transfer of oxygen is blocked as cyanide binds to the complex IV subunits. This stops the generation of the ATP molecules and thus cells die.

If the ATP will not be produced than the physiological responses in the cell which involves the ATP will get blocked like the movement in the cell, of the cell, the process of cell division and the transport which utilizes the ATP.

Since diffusion is a process which does not uses the ATP, therefore, it will be least affected by the cyanide.

Thus, Option-D is the correct answer.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.