University of Idaho Biology 114 Exam Two Questions and Answers Already Passed
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Course
University of Idaho Biology 114
Institution
University Of Idaho Biology 114
University of Idaho Biology 114 Exam
Two Questions and Answers Already
Passed
What characterizes adaptive radiation most accurately?
a. It occurs when a new trait allows access to previously unavailable ecological niches.
b. It is represented by a star-like evolutionary branching pattern.
...
University of Idaho Biology 114 Exam
Two Questions and Answers Already
Passed
What characterizes adaptive radiation most accurately?
a. It occurs when a new trait allows access to previously unavailable ecological niches.
b. It is represented by a star-like evolutionary branching pattern.
c. It typically involves multiple, swift speciation events.
d. It happens when one lineage produces a wide range of species with different ecological roles
over a short period. ✔✔d. It happens when one lineage produces a wide range of species with
different ecological roles over a short period.
Which factor does not contribute to adaptive radiations?
a. Movement of genes between populations
b. Availability of unoccupied ecological roles
c. Establishment in a new, isolated environment with suitable conditions and few competing
species
d. Emergence of a new evolutionary trait ✔✔a. Movement of genes between populations
How do mass extinctions differ from background extinctions?
1
,a. Mass extinctions occur when environmental changes eliminate certain populations completely.
b. Mass extinctions are primarily driven by natural selection.
c. Mass extinctions involve the loss of at least 60% of species within a million-year timeframe.
d. Mass extinctions happen because species are not well adapted to normal or slowly changing
environments. ✔✔c. Mass extinctions involve the loss of at least 60% of species within a
million-year timeframe.
What is the approximate age range covered by the fossil record?
a. 3.5 million years
b. 5.0 million years
c. 3.5 billion years
d. 5.0 billion years ✔✔c. 3.5 billion years
What provides the strongest evidence that life originated from prokaryotic ancestors rather than
eukaryotic ones?
a. Prokaryotic cells feature peptidoglycan in their walls.
b. Bacteria are unicellular organisms.
c. Prokaryotes possess flagella.
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, d. The oldest known life forms are prokaryotic. ✔✔d. The oldest known life forms are
prokaryotic.
Which statement accurately describes synapomorphy?
a. A trait shared by multiple monophyletic groups.
b. A characteristic found within a single monophyletic group but not outside of it.
c. The presence of multiple traits common to various monophyletic groups.
d. A feature that developed in several monophyletic groups independently. ✔✔b. A
characteristic found within a single monophyletic group but not outside of it.
In marine ecosystems, who are the primary producers?
a. Photosynthetic bacteria
b. Photosynthetic fungi
c. Photosynthetic plants
d. Photosynthetic protists ✔✔d. Photosynthetic protists
An organism that can both photosynthesize and obtain nutrients heterotrophically is referred to
as a:
a. Autotroph
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