A scientist studies a species of bird. The males and females look very similar
in color, but the males are much larger than the females. What can the
scientist conclude about these birds?
O
A. The males compete to fertilize.
O
B. The birds reproduce asexually.
O
C. The females choose mates.
O
D. The males choose mates.

The answer would be A. The males compete to fertilize. This is proven by the size of the males. Males would compete by fighting or making themselves look as large as possible until the opposing bird forfeits.

Explanation:

b - the respond is innate and varies over time.

good luck!

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.