You observe that in the population of cells grown from a single cell containing the transposon in GENEX some cells no longer contain the transposon in GENEX. Is this a DNA or RNA (Retrotransposon) transposon? Briefly explain your answer

what following? you said which of the following. but there is no be more specific.

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.

(nitrogen fixation) will be your answer sorry if im wrong