Which of the following is not true of a dichotomous key
A. they can be used to identify an organism by scientific knowledge
B. they can be used by anyone, even without specialized scientific knowledge
C. they can sometimes experience errors because closely related species may share many of the same characteristics
D. none of the above, they are all true

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.

gag reflex, poor dentition, gum retraction

have a good day

whats the drop down answers ?

explanation: