1.
The process by which new species form is called ___
2.
When populations can no longer interbreed and produce viable offspring, they are said to have ___
3.
A random change in DNA that can introduce new traits is a ___
4.
Speciation that occurs when populations are separated by a physical barrier is called ___ speciation
5.
Speciation that occurs without a physical barrier, often in the same area, is called ____ speciation.
6.
Mountains, rivers, or oceans can cause ___ isolation.
7.
When organisms reproduce at different times of day or year, it is called ___ isolation.
8.
Differences in mating behaviors (songs, dances, pheromones) cause ___ isolation.
9.
When reproductive organs are incompatible, it is called ___ isolation.
10.
When sperm and egg cannot fuse even if mating occurs, it is called ___ isolation.
11.
The offspring of two different species is called a ___
12.
Many hybrids, like mules, are infertile and cannot reproduce. If a hybrid can reproduce, it is said to be ___
13.
Over time, accumulated genetic differences can lead to ___ isolation.
14.
Speciation is more likely when populations experience different ___ pressures.
15.
A small population separated from a larger one may evolve differently due to ___ drift.
16.
A group of shrimp becomes trapped in a lagoon when sea levels drop. The lagoon shrimp evolve separately. When sea levels rise again, they can mate with ocean shrimp, but the embryos do not survive. This is ___ isolation due to hybrid ___
