Question

directions complete each sentence. use the words from the box. evolution mutations traits lethal populations 1. the diversity of organisms found on earth today is a result of the process called ______. 2. evolution does not occur in individuals. it occurs in ____ of organisms over time. 3. evolution works through ____ that change an organisms gametes. 4. these changes are passed on to offspring and affect the ____ of future generations. 5. if offspring inherit a ____ mutation, they die. therefore, such mutations are not passed on. directions list five ways in which one species may break into two groups and evolve into two different species. 6. ____ 7. ____ 8. ____ 9. ____ 10. ______

Explanation:

1. Evolution is the process that leads to the diversity of organisms on Earth.
2. Evolution occurs in populations of organisms over time, not in individuals.
3. Mutations are changes in an organism's gametes that evolution works through.
4. These changes affect the traits of future - generations when passed on to offspring.
5. Lethal mutations cause the death of the offspring, so they are not passed on.

6 - 10. Geographical isolation (physical barriers separate populations), ecological isolation (different habitats within the same area), behavioral isolation (different mating behaviors), temporal isolation (mating at different times), and mechanical isolation (incompatible reproductive structures) are ways a species can split into two.

Answer:

1. evolution
2. populations
3. mutations
4. traits
5. lethal
6. Geographical isolation
7. Ecological isolation
8. Behavioral isolation
9. Temporal isolation
10. Mechanical isolation