Biology 101 Questions ANSWER CHECK/HELP?
Question by melong: biology 101 questions ANSWER CHECK/HELP?
Hello everyone. These are multiple questions from biology 101 class. I’ve been reading and reading my book and I am still confused on all of them. I could answer half of them but half I have no clue. Please take your time and check my answers and help me on ones I couldn’t answer please. You DON’T have to answer them all, but answer ones you know for SURE. Thank you all very much in advance.
1) Which of the following is NOT a major process of microevolution?
a. mutation
b. divergence
c. genetic drift
d. gene flow
e. natural selection
ANSWER I THINK IS B
2) The genetic equilibrium of a population can be upset by all EXCEPT which of the following?
a. mutations
b. migration
c. random mating
d. genetic drift
e. natural selection
ANSWER I THINK IS C
3) The impact of natural selection is demonstrated by
a. directional selection.
b. stabilizing selection.
c. neutral selection.
d. disruptive selection.
e. directional selection, stabilizing selection, and disruptive selection.
ANSWER I THINK IS E
4) Populations of the peppered moth provide an example of ____ selection.
a. kin
b. disruptive
c. directional
d. stabilizing
e. artificial
ANSWER I THINK IS C
5) A general warming trend in northern climates might decrease the ice bridges that form between islands in the upper Great Lakes. Because animals travel across these bridges, this warming could result in
a. decreased gene flow.
b. more genetic heterogeneity.
c. healthier populations of animals.
d. more mutations.
e. all of these
ANSWER I THINK IS A
6) The famous “bell-shaped curve” that usually results when test scores are plotted against number of students is an example of what type of selection?
a. disruptive
b. stabilizing
c. divergent
d. variable e.
e. directional
7) The biological impact of the “founder effect” is based upon
a. absence of gene flow.
b. chance.
c. migration
d. nonrandom mating.
e. all of these
8) Four of the five characteristics listed below are those of an unchanging, nonevolving population. Select the exception.
a. random mating
b. no mutation
c. differential survival
d. no migration or gene flow
e. infinitely large population
9) Four of the five choices listed below are characteristics of mutations. Select the exception.
a. predictable
b. harmful or beneficial
c. random
d. effects depend upon environment
e. heritable
10) Four of the five choices listed below are examples of directional selection. Select the exception.
a. pesticide resistance
b. sexual dimorphism
c. wing color in peppered moths
d. coat color in rock pocket mice
e. antibiotic resistance
Best answer:
Answer by Sand
1.B
2. C
3.E
4.C
5.A
6.A.
7.C
8. D
9. A
10.http://arnica.csustan.edu/biol3020/selection/selection.htm
the ans to 10 is B
Add your own answer in the comments!