BIO1042 Questions Exam With
Complete Answers
Of the following anatomical structures, which is homologous to the bones in the wing of
a bird?
a. bones in the flipper of a whale
b. chitinous struts in the wing of a butterfly
c. bones in the hind limb of a kangaroo
d. bony rays in the tail fin of a flying fish - ANSWER a
Members of two different species possess a similar-looking structure that they use in a
similar way to perform about the same function. Which of the following would suggest
that the relationship more likely represents homology instead of convergent evolution?
a. both species are well adapted to their particular environments
b. the structures in adult members of both species are similar in size
c. The two species share many proteins in common, and the nucleotide sequences that
code for these proteins are almost identical.
d. the two species live at great distance from each other - ANSWER c
Structures as different as human arms, bat wings, and dolphin flippers contain many of
the same bones, which develop from similar embryonic tissues. These structural
similarities are an example of ________
a. the evolution of common structure as a result of common function
,b. the evolution of similar appearance as a result of common function
c. homology
d. convergent evolution - ANSWER c
Which factor most likely caused animals and plants in India to differ greatly from species
in nearby southeast Asia?
a. India is in the process of separating from the rest of Asia.
b. Life in India was wiped out by ancient volcanic eruptions.
c. The climates of the two regions are similar.
d. India was a separate continent until forty-five million years ago. - ANSWER d
Continental drift is the process were _______
a. bulging of the earth's outer core causes crustal movement leading to tectonic plate
redistribution
b. bulging of the earth's inner core causes crustal movement leading to tectonic plate
redistribution
c. movements of the earth's mantle cause tectonic plates to move over time
d. movements of the earth's tectonic plates cause the earth's mantle to move over time -
ANSWER c
Mountain systems are formed when tectonic plates _______
a. rise up due to bulging of the earth's inner and outer cores
b. slide past one another
,c. move apart from one another
d. collide into one another - ANSWER d
Australia's fauna is in sharp contrast with those of the rest of the world. When Australia
broke free of the other southern continents, ________
a. mammals mated with eutherians resulting in marsupials
b. eutherians diversified and marsupials became extinct
c. marsupials diversified and eutherians became extinct
d. marsupials mated with eutherians resulting in mammals - ANSWER c
How does continental drift affect living organisms?
a. It causes climate change, which puts selective pressure on organisms.
b. It causes changes in habitats, such as when large amounts of shallow marine habitat
were lost in the formation of Pangaea.
c. It may cause an increase or decrease in competition among different species.
d. It happens so slowly that it does not affect living organisms.
e. All but one of these are correct. - ANSWER e
There are three major groups of mammals, categorized on the basis of their _____
a. size
b. method of reproduction
c. method of locomotion
, d. habitat
e. presence or absence of hair - ANSWER b
What group of mammals have (a) embryos that spend more time feeding through the
placenta than the mother's nipples, (b) young that feed on milk, and (c) a prolonged
period of maternal care after leaving the placenta?
a. Marsupiala
b. Eutheria
c. Monotremata - ANSWER c
The term monotreme literally means ________.
a. closed digestive tract
b. ancient mammalian ancestor
c. single opening
d. able to lactate - ANSWER c
In the red kangaroo (Macropus rufus) an embyo's development can be arrested at the
blastocyst stage (embryonic diapause). Which of the following could occur before the
embryo resumes development?
I) death of the pouch young
II) pouch young completes its development and leaves then re-enters the pouch
III) pouch young completes its development and leaves the pouch permanently
Complete Answers
Of the following anatomical structures, which is homologous to the bones in the wing of
a bird?
a. bones in the flipper of a whale
b. chitinous struts in the wing of a butterfly
c. bones in the hind limb of a kangaroo
d. bony rays in the tail fin of a flying fish - ANSWER a
Members of two different species possess a similar-looking structure that they use in a
similar way to perform about the same function. Which of the following would suggest
that the relationship more likely represents homology instead of convergent evolution?
a. both species are well adapted to their particular environments
b. the structures in adult members of both species are similar in size
c. The two species share many proteins in common, and the nucleotide sequences that
code for these proteins are almost identical.
d. the two species live at great distance from each other - ANSWER c
Structures as different as human arms, bat wings, and dolphin flippers contain many of
the same bones, which develop from similar embryonic tissues. These structural
similarities are an example of ________
a. the evolution of common structure as a result of common function
,b. the evolution of similar appearance as a result of common function
c. homology
d. convergent evolution - ANSWER c
Which factor most likely caused animals and plants in India to differ greatly from species
in nearby southeast Asia?
a. India is in the process of separating from the rest of Asia.
b. Life in India was wiped out by ancient volcanic eruptions.
c. The climates of the two regions are similar.
d. India was a separate continent until forty-five million years ago. - ANSWER d
Continental drift is the process were _______
a. bulging of the earth's outer core causes crustal movement leading to tectonic plate
redistribution
b. bulging of the earth's inner core causes crustal movement leading to tectonic plate
redistribution
c. movements of the earth's mantle cause tectonic plates to move over time
d. movements of the earth's tectonic plates cause the earth's mantle to move over time -
ANSWER c
Mountain systems are formed when tectonic plates _______
a. rise up due to bulging of the earth's inner and outer cores
b. slide past one another
,c. move apart from one another
d. collide into one another - ANSWER d
Australia's fauna is in sharp contrast with those of the rest of the world. When Australia
broke free of the other southern continents, ________
a. mammals mated with eutherians resulting in marsupials
b. eutherians diversified and marsupials became extinct
c. marsupials diversified and eutherians became extinct
d. marsupials mated with eutherians resulting in mammals - ANSWER c
How does continental drift affect living organisms?
a. It causes climate change, which puts selective pressure on organisms.
b. It causes changes in habitats, such as when large amounts of shallow marine habitat
were lost in the formation of Pangaea.
c. It may cause an increase or decrease in competition among different species.
d. It happens so slowly that it does not affect living organisms.
e. All but one of these are correct. - ANSWER e
There are three major groups of mammals, categorized on the basis of their _____
a. size
b. method of reproduction
c. method of locomotion
, d. habitat
e. presence or absence of hair - ANSWER b
What group of mammals have (a) embryos that spend more time feeding through the
placenta than the mother's nipples, (b) young that feed on milk, and (c) a prolonged
period of maternal care after leaving the placenta?
a. Marsupiala
b. Eutheria
c. Monotremata - ANSWER c
The term monotreme literally means ________.
a. closed digestive tract
b. ancient mammalian ancestor
c. single opening
d. able to lactate - ANSWER c
In the red kangaroo (Macropus rufus) an embyo's development can be arrested at the
blastocyst stage (embryonic diapause). Which of the following could occur before the
embryo resumes development?
I) death of the pouch young
II) pouch young completes its development and leaves then re-enters the pouch
III) pouch young completes its development and leaves the pouch permanently
