That would be animals getting isolated into different groups in different locations. These animals would have to breed AND adapt to that location, otherwise they will become extinct. When each species adapts and breeds to agree with a different location, that would be called speciation.
Answer:
write the one word answers/their function for the description given
for example, answer 1)
Phloem cells that surround sieve tube elements. The tough covering of the root tip that protects the meristem. The part of the plant structure containing apical meristem tissue that can produce new stems and leaves. The central region of a root that includes the vascular tissue -- xylem and phloem.
I'm not sure.... but Manuel scalpels?
C. esophagus. it does not secrete any enzymes. its just do peristalsis. which is a rhythmic contractions and relaxations of muscles to push food along the gut
