specialized epithelial tissue that lines blood and lymph vessels is known as a. endothelium b. loose connective tissue c. epithelium d. dense connective tissue

segmentation=endoskeleton=backbone=coelom=tissues

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

c.           is the correct answer

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