The failure of chromosomes to separate during
mitosis or meiosis is called
a. genetic displacement.
b. trisomy.
c. crossing over.
d. nondisjunction.
e. disjunction.
Answer: d
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In contrast to most other plant hormones, which hormone is a germination inhibitor?
a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene
An example of ex situ conservation is a national park
___________________ Indicate whether the statement is true or false.
In leaf cutter ant colonies, the ants clip leaves to feed a fungus garden and then the ants feed on the fungus. Is this a mutualistic relationship?
A. Yes, the ants and the fungus are engaged in a mutually beneficial symbiotic relationship. B. No, the ants are leaf parasites but have no relationship with the fungus. C. No, the ants are parasites on both the leaves and fungus. D. Yes, the ants and the trees are in a mutualistic relationship.
Which of the following is an autoimmune disease?
A) type 1 diabetes B) anaphylactic shock C) AIDS D) allergies