Biology 1407 Test 1 Questions with Correct
Answers
Which of the following is problematic when the goal is to construct phylogenies that
accurately reflect evolutionary history?
D) Two of the responses are correct
Linnaeus was a "fixist" who believed that species remained fixed in the form in which
they had been created. Linnaeus would have been uncomfortable with
C) phylogenies
The best classification system is that which most closely
D) reflects evolutionary history
The phenomenon of fusion is likely to occur when, after a period of geographic
isolation, two populations meet again and
E) an increasing number of viable, fertile hybrids is produced over the course of generations
What distinguishes a coelomate animal from a psuedocoelomate animal is the
coleomates
A) have a body cavity completely lined by mesodermal tissue, whereas psuedocoelomates do
not
Seasonal changes in snake activity are due to the fact that the snake
C) is more active in summer because it can gain body heat by conduction
What is true of the amino acids that might have been delivered to Earth within
carbonaceous chondrites?
,D) There were more kinds of amino acids on the chondrites than are found in living
organisms.
The common ancestors of birds and mammals were very early (stem) reptiles, which
almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and
mammals, however, are alike in having four-chambered hearts (two atria, two
ventricles). The four-chambered hearts of birds and mammals are best described as
D) homoplasies
In modern terminology, diversity is understood to be a result of genetic variation.
Which of the following is a recognized source of variation for evolution?
A) recombination by crossing over in meiosis
Which clade in the phylum Cnidaria includes "jellies" with rounded (as opposed to
boxlike) medusae?
A) Scyphozoa
Which of the following statements most detracts from the claim that the human
appendix is a completely vestigial organ?
B) The appendix has a substantial amount of defensive lymphatic tissue.
How many other bands of sea-floor crust in Figure 25.1 have the same magnetic
polarity as the crust that directly straddles the rift valley?
E) four bands
If a particular marine organism is fossilized in the sediments immediately overlying the
igneous rock at the arrow labeled "II," at which other location, labeled A-E, would a
search be most likely to find more fossils of this organism?
, B) C only
Assuming that the rate of sea-floor spreading was constant during the 1-million-year
period depicted above, what should be the approximate age of marine fossils found in
undisturbed sedimentary rock immediately overlying the igneous rock at the arrow
labeled "II"?
B) 400,000 years
Which of the following is a diploblastic phylum of aquatic predators?
D) Cnidaria
In a hypothetical situation, a certain species of flea feeds only on pronghorn antelopes.
and rangelands of the western United States, pronghorns and cattle often associated
with one another. If some of these fleas develop a strong preference for cattle blood and
may only with other fleas that prefer cattle blood, then over time which of these should
occur, if the host mammal can be considered as the fleas' habitat?
E) 1 through 4
The largest unit within which gene flow can readily occur is a
E) species.
Which of these species was the first to have been adapted for long-distance bipedalism?
C) H. ergaster
If cetaceans are determined to have diverged from the lineage leading to the
artiodactyls before the divergence of lineages leading to the modern artiodactyls
(including hippos), then the cetaceans can also be considered
A) 1 only
Answers
Which of the following is problematic when the goal is to construct phylogenies that
accurately reflect evolutionary history?
D) Two of the responses are correct
Linnaeus was a "fixist" who believed that species remained fixed in the form in which
they had been created. Linnaeus would have been uncomfortable with
C) phylogenies
The best classification system is that which most closely
D) reflects evolutionary history
The phenomenon of fusion is likely to occur when, after a period of geographic
isolation, two populations meet again and
E) an increasing number of viable, fertile hybrids is produced over the course of generations
What distinguishes a coelomate animal from a psuedocoelomate animal is the
coleomates
A) have a body cavity completely lined by mesodermal tissue, whereas psuedocoelomates do
not
Seasonal changes in snake activity are due to the fact that the snake
C) is more active in summer because it can gain body heat by conduction
What is true of the amino acids that might have been delivered to Earth within
carbonaceous chondrites?
,D) There were more kinds of amino acids on the chondrites than are found in living
organisms.
The common ancestors of birds and mammals were very early (stem) reptiles, which
almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and
mammals, however, are alike in having four-chambered hearts (two atria, two
ventricles). The four-chambered hearts of birds and mammals are best described as
D) homoplasies
In modern terminology, diversity is understood to be a result of genetic variation.
Which of the following is a recognized source of variation for evolution?
A) recombination by crossing over in meiosis
Which clade in the phylum Cnidaria includes "jellies" with rounded (as opposed to
boxlike) medusae?
A) Scyphozoa
Which of the following statements most detracts from the claim that the human
appendix is a completely vestigial organ?
B) The appendix has a substantial amount of defensive lymphatic tissue.
How many other bands of sea-floor crust in Figure 25.1 have the same magnetic
polarity as the crust that directly straddles the rift valley?
E) four bands
If a particular marine organism is fossilized in the sediments immediately overlying the
igneous rock at the arrow labeled "II," at which other location, labeled A-E, would a
search be most likely to find more fossils of this organism?
, B) C only
Assuming that the rate of sea-floor spreading was constant during the 1-million-year
period depicted above, what should be the approximate age of marine fossils found in
undisturbed sedimentary rock immediately overlying the igneous rock at the arrow
labeled "II"?
B) 400,000 years
Which of the following is a diploblastic phylum of aquatic predators?
D) Cnidaria
In a hypothetical situation, a certain species of flea feeds only on pronghorn antelopes.
and rangelands of the western United States, pronghorns and cattle often associated
with one another. If some of these fleas develop a strong preference for cattle blood and
may only with other fleas that prefer cattle blood, then over time which of these should
occur, if the host mammal can be considered as the fleas' habitat?
E) 1 through 4
The largest unit within which gene flow can readily occur is a
E) species.
Which of these species was the first to have been adapted for long-distance bipedalism?
C) H. ergaster
If cetaceans are determined to have diverged from the lineage leading to the
artiodactyls before the divergence of lineages leading to the modern artiodactyls
(including hippos), then the cetaceans can also be considered
A) 1 only
