12 Jun BIOLOGY 1409 There is abundant water on the Earth Question # 00345494
Question
Question 6
A _______ is a group of individuals of the same species that occupy a certain area.
a. population
b. community
c. ecosystem
d. trophic level
e. cohort
1 points
Question 7
There is abundant water on the Earth. We have a global water crisis because:
a. too few people live near the oceans where most of the water is located
b. it is too expensive to transport water from the oceans
c. most of our water is too salty for drinking or agriculture
d. all of the above
1 points
Question 8
Mutations that neither harm nor help an organism are called:
a. dominant
b. deleterious
c. lethal
d. neutral
e. recessive
1 points
Question 9
The categories of biogeochemical cycles include all of the following EXCEPT:
a. carbon cycle
b. hydrologic cycle
c. nitrogen cycle
d. green plant cycle
1 points
Question 10
The reason that the human population has increased to such a high level is that we have:
a. Sidestepped several limiting factors.
b. Expanded into new habitats and climatic zones.
c. Increased the carrying capacity of existing habitats.
d. All of these choices.
1 points
Question 11
Which is NOT a density-dependent, growth limiting factor?
a. predation
b. parasitism
c. disease
d. flooding
e. competition
1 points
Question 12
The fact that the average human birth weight remains at about seven pounds is due to __________________ .
a. modern prenatal care.
b. the forces of stabilizing selection.
c. the conscious effort of the mother.
d. the limitations of the size of the womb.
e. a recessive allele in the mother.
1 points
Question 13
Stabilizing selections means that:
a. the environment controls which organisms will survive.
b. humans determine which organisms will survive.
c. the extremes of the population have a lesser chance to survive.
d. the extremes of the population have a better chance to survive.
e. the organisms on one extreme of the population have a better chance to survive than those on the other extreme.
1 points
Question 14
Which organism does not feed from a single trophic level?
a. oak tree
b. zebra
c. mushroom
d. rabbit
e. grass
1 points
Question 15
Which of the following tends to stabilize gene frequencies among populations of a species?
a. Genetic drift
b. Gene flow
c. Mutation
d. Natural selection
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