Download Overproduction Genetic Variation Struggle to Survive Successful

Components of Natural Selection Classification
Evolution
Name: ___________________________#_____
Date. ______________________ Per. ________
Determine the correct classification for each of the listed statements. Write the number in the correct box.
Statements:
1. A population of salmon contains some salmon
that are stronger swimmers than others.
Overproduction
2. After reaching maturity, hawks engage in an
elaborate mating ritual and have offspring as
a result.
3. Many rabbits do not survive because of
predation by coyotes and hawks or not
enough available food.
4. Rabbits that live to maturity may mate and
produce offspring.
Genetic Variation
5. Roaches lay many eggs.
6. Salmon that live to maturity may mate and
produce offspring.
7. Roaches that live to maturity may mate and
produce offspring.
8. A population of rabbits contains some rabbits
with fur better camouflaged in their
environment.
Struggle to Survive
9. Many salmon do not survive to adulthood
because of predation by bears or sharks.
10. Hawks are killed by power lines, hunters, and
other predators.
11. Salmon lay many eggs in gravel beds each
year before dying.
12. A population of roaches contains some
pesticide-resistant roaches and some that are
not resistant to pesticides.
Successful Reproduction
13. Rabbits reproduce quickly and produce many
offspring with each litter.
14. Many roaches do not survive because they
come in contact with pesticides.
15. Some hawks have better eyesight than other
hawks.
16. Hawks lay 1-3 eggs per year.
Which two components are essential in order for natural selection and evolution to change the genetic
composition of a species? _______________________________________________________________________