A biologist sets out to explore if the average body mass of adult hummingbirds can evolve due to natural selection. The biologist goes out to weigh the mass of adult hummingbirds in a population in 1998 and again in 2018. The biologist also examines how the mass of the parents impacts the mass of their offspring when they reach adulthood. Assume that enough generations of hummingbirds have been born over this time span that it is possible that characteristics such as body mass could have evolved. The figures below illustrate the data the biologist collected. Based on these data, the biologist concluded that the body mass of adult hummingbirds in this population has evolved by natural selection. Do you think the data supports, or does not support, the biologists conclusions

satellites are frequently used to make observations of the orbit on earth

genetic variation will increase because of a new habitat and food source.

explanation:

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.