BIO 152 Final Exam Practice Questions || A+ Verified
Solutions.
Scientists hypothesize that vertebrate jaws evolved from:
a. Vertebrae
b. Gill arches
c. Teeth
d. Scales
e. Skin correct answers b
Which of the following is not a unifying feature of all chordates?
a. Cranium
b. Notochord
c. Post-anal tail
d. Pharyngeal gill slits (or pouches) correct answers a
Which feature is unique to the echinoderm lineage?
a. Water vascular system
b. Radial symmetry
c. Endoskeleton
d. Exoskeleton correct answers a
Which vertebrate has jaws with movable hinges at the top and bottom, as well as each side (four
moveable hinges)?
a. Humans
b. Fish
c. Snakes
d. Sharks correct answers d
The most common type of homeostatic pathway used by animals to maintain a
stable internal environment is the:
a. Endothermic
b. Exothermic
c. Positive feedback
d. Feedforward
e. Negative feedback correct answers e
Snakes are uncommon in Canada, rare in Alaska, and completely absent from Antarctica. What
limits their ability to survive in such environments?
a. They are ectothermic
b. They are endothermic
c. They are osmoconformers
d. They are osmoregulators correct answers a
, The amount of oxygen in the blood of a cheetah begins to decrease, as it chases down some prey.
Which of the following is responsible for evaluating information about the change in the
cheetah's blood oxygen content and initiating a response?
a. Stimulus
b. Integrating center
c. Efferent pathway
d. Receptor
e. Effector correct answers b
The figure to the right shows the chloride concentrations in the blood of an aquatic snail exposed
to different saltwater (NaCl) concentrations. Based on the information in the figure for the snail
indicated by the solid black circles, we can conclude that this species is a/an:
a. Osmoregulator
b. Osmoconformer
c. Both osmoconforming and
osmoregulating, but at different
times***
d. The graph doesn't provide any evidence for the animal osmoconforming
or osmoregulating correct answers a
A student comes to lecture but hasn't had anything to drink all day. Their mouth begins to feel
dry and they have an urge to take a drink from a peer's water bottle. Why is the student's body
acting like this?
a. The effector is trying to tell the integrating center that the body needs water
b. The set-point (what the body considers as normal) in the student's body is higher in the
afternoon and lower in the evening
c. The stimulus in the body is trying to elevate the water content in the body
d. The effectors in their body are trying to reduce the water content in the
body
e. Their integrating center is sending out commands to return the water
content in the body to normal levels correct answers e
An ectothermic animal is most active when:
a. It is warm
b. It is humid or rainy
c. It is cold
d. It is night (dark)
e. All the time correct answers a
Suppose you have relatively neutral soil containing lots of clay particles. What would happen if
you poured a slightly acidic liquid into the soil?
a. Proton pumps in the roots of plants would quickly neutralize the acidity.
b. Cations bound to the clay particles would be released.
c. Anions bound to the clay particles would be released.
d. Fixed nitrogen would react, forming nitrogen gas
e. Nothing would happen. Acids don't effect the soil or plants correct answers b
Solutions.
Scientists hypothesize that vertebrate jaws evolved from:
a. Vertebrae
b. Gill arches
c. Teeth
d. Scales
e. Skin correct answers b
Which of the following is not a unifying feature of all chordates?
a. Cranium
b. Notochord
c. Post-anal tail
d. Pharyngeal gill slits (or pouches) correct answers a
Which feature is unique to the echinoderm lineage?
a. Water vascular system
b. Radial symmetry
c. Endoskeleton
d. Exoskeleton correct answers a
Which vertebrate has jaws with movable hinges at the top and bottom, as well as each side (four
moveable hinges)?
a. Humans
b. Fish
c. Snakes
d. Sharks correct answers d
The most common type of homeostatic pathway used by animals to maintain a
stable internal environment is the:
a. Endothermic
b. Exothermic
c. Positive feedback
d. Feedforward
e. Negative feedback correct answers e
Snakes are uncommon in Canada, rare in Alaska, and completely absent from Antarctica. What
limits their ability to survive in such environments?
a. They are ectothermic
b. They are endothermic
c. They are osmoconformers
d. They are osmoregulators correct answers a
, The amount of oxygen in the blood of a cheetah begins to decrease, as it chases down some prey.
Which of the following is responsible for evaluating information about the change in the
cheetah's blood oxygen content and initiating a response?
a. Stimulus
b. Integrating center
c. Efferent pathway
d. Receptor
e. Effector correct answers b
The figure to the right shows the chloride concentrations in the blood of an aquatic snail exposed
to different saltwater (NaCl) concentrations. Based on the information in the figure for the snail
indicated by the solid black circles, we can conclude that this species is a/an:
a. Osmoregulator
b. Osmoconformer
c. Both osmoconforming and
osmoregulating, but at different
times***
d. The graph doesn't provide any evidence for the animal osmoconforming
or osmoregulating correct answers a
A student comes to lecture but hasn't had anything to drink all day. Their mouth begins to feel
dry and they have an urge to take a drink from a peer's water bottle. Why is the student's body
acting like this?
a. The effector is trying to tell the integrating center that the body needs water
b. The set-point (what the body considers as normal) in the student's body is higher in the
afternoon and lower in the evening
c. The stimulus in the body is trying to elevate the water content in the body
d. The effectors in their body are trying to reduce the water content in the
body
e. Their integrating center is sending out commands to return the water
content in the body to normal levels correct answers e
An ectothermic animal is most active when:
a. It is warm
b. It is humid or rainy
c. It is cold
d. It is night (dark)
e. All the time correct answers a
Suppose you have relatively neutral soil containing lots of clay particles. What would happen if
you poured a slightly acidic liquid into the soil?
a. Proton pumps in the roots of plants would quickly neutralize the acidity.
b. Cations bound to the clay particles would be released.
c. Anions bound to the clay particles would be released.
d. Fixed nitrogen would react, forming nitrogen gas
e. Nothing would happen. Acids don't effect the soil or plants correct answers b
