5. Two plants are grown using the same light and pots. One plant is given water that has
been microwaved and the other plant is given
regular tap water. Their height is measured
after 2 weeks.

Explanation:

independent variable is something that scientists change in an experiment. A dependent variable is something that changes BECAUSE of the independent variable. In other words, the dependent variable DEPENDS on the independent variable. The dependent variable is usually what scientists measure in an experiment.

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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.