Download Test Review Answers - Northwest ISD Moodle

Answers to Review
• 1. Survival of the fittest means that only the best
adapted to the environment survive to reproduce
• 2. Fit means adaptations to the environment
• 3. No animals do not adapt. Those with the good
traits survive, reproduce, and those traits are
passed on to future generations.
• 4. No the organism does not change. Individuals
do not change in response to the environment.
• 5. Natural selection produces changes in
populations
Answers to Review Continued
6. The gene pool is the sum of all genes in a population!
7. The separation of two populations of the same species or
breeding group by physical barrier.
8. Species
9. P. aurelia
10. P. caudatum is dying off (not adapted to the environment).
11. The frequency of the genes will increase over time.
12. Genetic variation: Diversity in gene frequency. Occurs
because of mutations, recombination (Sexual reproduction)
and gene flow
13. Gene flow is the movement of alleles between
populations (Immigration and Emigration)
Answers to Review Continued
• 14. Genetic variation increases
• 15. Camo allows the organism to hide from
predators and/or catch its prey
• 16. Mimicry makes the organism look less
desirable to its predator.
• 17. This is an example because the least
resistant antibiotics are less adapted to the
environment and therefore
Answers to Review
• 18. Traits acquired during your lifetime are not passed
on as inherited traits. Must be in gamete DNA!
• 19. At the point that a newer population is no longer
able to breed with its parent population yielding plenty
of fertile children, if members were brought together.
• 20. The pesticide decreased in efficiency because the
least adapted roaches died off, leaving those behind
that are suited for that environment
• 21. Stabilizing: Favors the middle over the extremes
Directional: favors one extreme over the other
Disruptive: Favors the extremes over the middle.
Answers to Review
• 22. Natural Selection is the gradual process by which heritable
biological traits become either more or less common in a
population as a function of the effect of inherited traits on the
differential reproductive success of organisms interacting with their
environment. It is a key mechanism of evolution
• 23. Because of differential reproductive success, more offspring
must be born than can possibly survive (Think the frog eggs (1%
survive to adulthood))
• 24. Speciation is the evolutionary process by which new biological
species arise.
• 25. Pre-Zygotic (Mechanical, temporal, geographic, etc) and postzygotic
• 26. Genetic drift is the change in the frequency of a gene variant
(allele) in a population due to random sampling.
Answers to review
• 27. The founders in the population will have a
different frequency of alleles than the original
population. Small size typically means less
diversity
• 28. Gene frequency is the proportion of a
particular allele (variant of a gene) among all
allele copies being considered.
• 29. nucleotide