Cells produced in the incision-healing process in the cat’s abdomen would be ___
ID: 78752 • Letter: C
Question
Cells produced in the incision-healing process in the cat’s abdomen would be ____ the other cells on her abdomen.
a) half the size of
b) haploid versions of
c) genetically different from
d) genetically identical to
During the same visit, your veterinarian recommended that your cat also receive a vaccination for feline distemper. This vaccine stimulated the cat’s immune system to produce which one or more of the following?
a) antigens b) memory cells c) antibodies d) antibiotics e) both b & c
[1] The male elephant seal (l) is much larger than the female (r) of the species. Males spend very little time raising their young. You would correctly predict that the male’s size is due primarily to _________ and that he is ___________in his mating habits.
a) natural selection; monogamous
b) sexual selection; polygamous
c) natural selection; polygamous
d) sexual selection; monogamous
[2] The Good Genes Hypothesis would account for which of the following characteristics of males that attract the most females?
a) Peacock tails, which prevent males from seeing behind them when they court
b) Sailfin molly, a dorsal-finned fish, which are enormous and easily spotted by predators
c) Guppy tailfins, which reduce their swimming speed.
d) Gray tree frogs, that call the longest and produce offspring that mature quickest
e) Fish that produce bright colors, yet have very weak immune systems.
[3] In mice, a recessive autosomal allele (o) results in obesity because the mice are unable to produce the hormone leptin from their fat cells.Normal mice with the dominant allele (O) do produce leptin. Homozygous recessive (oo) obese mice injected with leptin are observed to lose weight.
In a cross between two mice that are heterozygous for the obesity gene (Oo), you would predict which one of the following?
a) All the offspring will be obese.
b) All the offspring will be normal.
c) 50% of offspring will be able to produce leptin.
d) Obese offspring would eat less and burn more calories if injected with leptin.
e) Fat cells in obese mice release more leptin than those of their normal parents.
[4] A scientist discovers a new mutant mouse that he calls “Chunky” because they are 80% heavier than normal mice. Which one or more of the following predictions would be correct?
a) Chunky mice could have the “dd” genotype.
b) Normal mice produce more thyroxin (thyroid hormone) than Chunky mice.
c) Glycolysis would occur more rapidly in Chunky mice than normal mice.
d) A protein that blocks leptin receptors would promote weight loss in all Chunky mice.
e) Both (a) & (b) are correct.
[5] When she was 6 months old, your cat was surgically altered so that they could not reproduce. This required a small incision into the cat’s abdomen to remove the ovaries. This incision healed by a type of cell division called ______.
a) endocytosis b) meiosis c) mitosis d) exocytosis e) fusion
[6] Cells produced in the incision-healing process in the cat’s abdomen would be ____ the other cells on her abdomen.
a) half the size of
b) haploid versions of
c) genetically different from
d) genetically identical to
[7] During the same visit, your veterinarian recommended that your cat also receive a vaccination for feline distemper. This vaccine stimulated the cat’s immune system to produce which one or more of the following?
a) antigens b) memory cells c) antibodies d) antibiotics e) both b & c
How did the imagery of witches flying upon broomsticks originate? Historians have found evidence that some medieval European “drug cults” included women who would prepare a potion by grinding up belladonna plants into an extract. Known as an anesthetic and muscle relaxant, this extract was applied using long sticks on the skin for rapid absorption into the bloodstream. The resulting symptoms included slowed breathing, dilated pupils, heavy eyelids, and a delirious sensation of flying.
[8] If one of these “witches” wanted to counteract her shallow breathing and muscular weakness, you might recommend that she use …
a) botulinum toxin--an inhibitor of the release of acetylcholine.
b) calabar beans that contain an inhibitor of acetylcholinesterase.
c) a frog toxin that keeps the sodium ion (Na+) channels of the axon stuck opened.
d) curare, which blocks acetylcholine binding to post-synaptic muscle cells.
e) oubain, a plant toxin which inhibits the Na+/ K+ATPase pump.
After running around, a dog lies down to rest. Which of the following does not describe the flow of heat?
a. The dog loses heat by conduction to the warmer ground.
b. The dog loses heat by the evaporation through panting.
c. The dog loses heat by convection to the wind.
d. The dog gains heat by the radiation from the sun.
e. The dog generates heat by respiration.
What is the smallest number of DNA nucleotide sequence changes that must occur to cause a change in one amino acid in a particular protein?
a) 0 b) 1 c) 2 d) 3 e) 64
Explanation / Answer
Answer 1: genetically identical to (As explained below)
Changes effected during the lifetime of an individual such as cutting of hair, amputation and incisions are not inherited. They are somatic in nature and thus identical in their genetic make-up to other somatic cells.
Answer 2: antibodies (As explained below)
Vaccines are a mode of inducing immunity into an individual by producing antibodies in response to antigen introduced through vaccines.
Answer 3: sexual selection; polygamous (As explained below)
The size of males has been promoted over generations due to the females selecting males of bigger size for mating. The selection for the trait could be rooted in the female’s belief in increased survival of itself and its progeny by virtue of the big size (strength) of the male. Also, the tendency of the male to overlook raising of their young ones is indicative of polygamy because, they are unsure which amongst the many young ones actually would be form them and thus they avoid the risk of nurturing someone else’s progeny by simply overlooking the issue.
Answer 4: Changes in pressure created by evapotranspiration of water through stomata (As explained below)
Good hypothesis underlines the principle that traits opted by the female to select the male are the ones that will increase chances of survival for itself and its progeny. Option A explains benefit of the tail for unhindered mating and nothing in terms of survival. So, it is incorrect. Option B predisposes the animal to its prey thus threatening its survival. So, it is incorrect. Option C indicates weakness of the animal in the face of attack and thus threatening its survival. So, it is incorrect. Option D indicates the male strength in alerting in times of danger and also benefit to the progeny. So, it is the correct option. Option E indicates a weakness that could be a threat to survival. So, it is incorrect.
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