What does the lack of genetic diversity imply about the history of the cheetah population?

The lack of genetic diversity implies that the history of the cheetah population was relatively "calm" and undisturbed; in other words, there weren't crazy environmental stimuli and changes. The reason for this is based on the fact that the population had a lack of genetic diversity, as fewer genetic diversity means less of an ability to adapt to environmental stimuli/changes.

c. heat from the poles back down towards the equator.

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.