4) In an experiment to study the effect of amylase on starch, samples of substrate and enzyme solutions are taken. The
volumes of substrate and enzyme solutions in each sample are the same. The temperature at which the experiment is
performed is also constant. The buffer solutions used for the experiment have pH 3, pH 5, pH 7, pH 9, and pH 11.
What can be BEST predicted about the result?

bc blah

explanation:

bc blah

idk lol use google m8

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.