Fill in the Blank: Write the word that best completes each sentence.. 17. Unlike animal cells, plant cells have
vacuoles, and a
wall.
cells have membrane-
18. Prokaryotic and Eukaryotic cells differ in that
bound organelles, and
cells do not have a nucleus.
19. Cell membranes are made up of a phospholipid bilayer. Which part of the phospholipid
bilayer interacts with water? Which part does not interact with water?
20. Name the three main parts of the modern cell theory.
1-
2-
3-

Explanation:

1. Unlike animal cells, plant cells have vacuoles, and a cell wall

2. Cell membranes are made up of a phospholipid bilayer. Which part of the phospholipid bilayer interacts with water? Which part does not interact with water?    nonpolar fatty acid tails.                                                                                

3. first, that DNA is passed between some cells during cell division; second, that the cells of all organisms within a similar species are mostly the same, both structurally and chemically; and finally, that energy flow occurs within

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.