Our Environment: A Canadian Perspective , 5th Edition Dianne Draper; Ann Zimmerman
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Which of these characteristics is the essential difference between mass and weight?
a. Matter has mass, but not weight.
b. Mass is measured in different units.
c. Mass is universal, but weight depends on gravity.
d. Energy has mass but not weight.
Which of the following molecules would be considered organic?
Which of these compounds has the greatest energy density?
b. diesel fuel
The theory of uniformitarianism is defined by what principle?
a. The present is the same as the past.
b. The present is fundamentally different from the past.
c. The forces that operated in the past are still operating.
d. There is only one major geological force.
Which of these layers of Earth contains the heaviest metals?
Suppose a certain species of whale plays host to a species of invertebrate that lives on the whales’ backs and have no apparent effect on them. What is the best term for the relationship between these two species?
According to the text, why is energy flow in biological systems always a net loss, in terms of energy?
a. Biological systems are unpredictable.
b. Energy is lost at each stage as heat.
c. Nutrients cannot be broken down.
d. Consumers expend more energy than they consume.
According to the text, why is there a difference between gross and net primary productivity?
a. Energy is lost as heat.
b. Energy is used to build biomass.
c. Energy is obtained from nonrenewable sources.
d. Energy is higher on a lower trophic level.
Why is the growth of a population generally NOT exponential?
a. because of sexual reproduction
b. because of symbiosis
c. because of limited resources
d. because of respiration
Which of these sorts of species might have a cyclic population growth curve?
a. one that is subject to predation
b. one that lives in a stable environment
c. one with no competitors
d. one with a parasite
Which of these factors is a reason given for the failure of Biosphere II?
a. No ecologists served as bionauts.
b. There were issues with electricity production.
c. Technology was inadequate.
d. The bionauts were vegetarians.
Which of these statements is the difference between primary and secondary succession?
a. Primary succession always takes a long time.
b. Secondary succession requires no pioneer species.
c. Primary succession happens only in arctic climates.
d. Secondary succession starts with productive soil.
In evolution by natural selection, which of these processes occurs first?
b. environmental change
Why was the Tibetan population able to adapt biologically to altitude so quickly?
a. They had many children.
b. Their environment was extreme.
c. They could adapt by changing a single gene.
d. Their mutation rate was able to adapt very fast.
Which of these factors led to the paler pigmentation seen in the human populations of northern Europe?
a. They no longer required the darker pigmentation of their ancestors.
b. They needed to blend into a snowy background.
c. They lacked certain genes.
d. They needed to increase their absorption of vitamin D.
Why are black bears and grizzly bears theoretically the same species?
a. because they are still able to interbreed
b. because they share genes
c. because they appear similar
d. because their habitats overlap
Which of these factors is one aspect of living systems that humans tend to think does not apply to our species?
Suppose a certain species is removed from an ecosystem and almost immediately another species takes its place, in both geographical and ecological terms. Which of the following is the most likely explanation?
a. The other species had a larger fundamental niche.
b. This is a result of evolutionary adaptation.
c. The first species was weak.
d. The other species was a keystone species.
According to the text, what is the single most important factor in determining an ecosystem’s level of biodiversity?
a. its size
b. its elevation
c. the level of precipitation
d. the number of niches it contains
Which of these factors is the reason why so many different species of warbler are able to colonize the same tree?
a. competitive exclusion
b. differences between fundamental and realized niches