Pattern dating on which fossilized organisms has been found to be similar to their living form today? select all that apply.

clams
fish
trees
starfish

what is the statement?

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.