Which type of plant hormone is a gas at normal temperature and pressure?
a. abscisic acid
b. ethylene
c. auxin
d. salicylic acid
e. systemin
B
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Two plant species live in the same location and flower at the same time, but do not hybridize because they have
unique pollinators. This is an example of ____.
a. hybrid inviability b. hybrid breakdown c. a postmating reproductive mechanism d. a postzygotic reproductive barrier e. a prezygotic reproductive barrier
What function does the gall bladder serve?
A) nutrient absorption B) bile storage and concentration C) sugar digestion D) fat storage
How does the availability of milkweed plants affect the migration of monarch butterflies?
a. Without milkweed plants, the female monarch would starve. b. Without milkweed plants, the monarch larvae would starve. c. Without milkweed plants, the male monarch would starve. d. When milkweed plants are abundant, monarch predators would thrive e. When milkweed plants are abundant, the male monarch could not find a mate.
What did the results of Rolls et al. (1990) suggest?
What will be an ideal response?