Which of the following is true about studying cell theory? (Choose all that apply) A. Cell biology is a more specialized area of life science that studies only cells--their properties, their structure, how they function, and how they interact with their environments. B. Cell theory is widely accepted so its tenets no longer need to be tested. C. Cell theory is still being tested by new observations and advances in science. D. Microscopes have become more advanced and allow scientists to see the details of a cell. 20 PTS

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

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.

true

explanation: