There are three animal phyla that include “worm” in their common names. Why aren’t all worms placed into one phylum? What is different about each group of organisms that requires us to classify them into multiple phyla? Provide examples

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.

make   gliitsh plesea   !

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.