AP Biology Unit 8 comprehensive
Questions and Answers with Verified
Solutions
Question 1:
Which of the following describes the mechanism by which a plant stem
grows toward light?
Answer:
Cells on the dark side of the stem elongate more than those on the
lighted side.
Question 2:
As depicted in the diagram, honeybees communicate the location of
flower patches to members of their hives with waggle dances that give
information about the direction and distance to the flowers. Which of the
following statements about how honeybees communicate the position of
flower patches is most consistent with the model?
Answer:
The farther the target flowers from the hive, the longer the waggle phase.
,Question 3:
Hydrangea macrophylla is a species of plant with blue or pink flowers.
Flower color in Hydrangea macrophylla plants is thought to be
determined primarily by soil conditions rather than by inherited
differences. Which of the following will provide the most direct evidence
that flower color in Hydrangea macrophylla is due primarily to soil
conditions?
Answer:
Growing cuttings from the same Hydrangea macrophylla plant under
controlled conditions that vary only with regard to soil pH
Question 4:
In some species of bats, adult females regurgitate (bring up food from the
stomach) to feed their young. In addition, adult bats regurgitate to feed
other adults that have not recently eaten. The adults receiving the food
may be unrelated bats who have previously participated in food sharing
and are members of the same social group. Scientists claim that sharing
among unrelated adult bats increases the fitness of the species. Which of
the following best supports the scientists' claim?
Answer:
Bats that do not find food over a 24-hour period may die, preventing their
alleles from being passed on within the social group.
, Question 5:
Testosterone oxido-reductase is a liver enzyme that regulates
testosterone levels in alligators. One study compared testosterone
oxido-reductase activity between male and female alligators from Lake
Woodruff, a relatively pristine environment, and from Lake Apopka, an
area that has suffered severe contamination. The graph above depicts
the findings of that study. The data in the graph best support which of the
following claims?
Answer:
Environmental contamination reduces total testosterone oxido-reductase
activity in females.
Question 6:
Germination would be expected to occur first in which beaker?
Answer:
1
Question 7:
Identify the experimental design that would determine which AIP mimic
would most effectively inhibit the production of hemolysin toxin.
Answer:
Grow S. aureus in separate culture media containing one AIP mimic each
and measure the production of hemolysin toxin. The most effective AIP
mimic will be in the culture producing the lowest amount of hemolysin.
Questions and Answers with Verified
Solutions
Question 1:
Which of the following describes the mechanism by which a plant stem
grows toward light?
Answer:
Cells on the dark side of the stem elongate more than those on the
lighted side.
Question 2:
As depicted in the diagram, honeybees communicate the location of
flower patches to members of their hives with waggle dances that give
information about the direction and distance to the flowers. Which of the
following statements about how honeybees communicate the position of
flower patches is most consistent with the model?
Answer:
The farther the target flowers from the hive, the longer the waggle phase.
,Question 3:
Hydrangea macrophylla is a species of plant with blue or pink flowers.
Flower color in Hydrangea macrophylla plants is thought to be
determined primarily by soil conditions rather than by inherited
differences. Which of the following will provide the most direct evidence
that flower color in Hydrangea macrophylla is due primarily to soil
conditions?
Answer:
Growing cuttings from the same Hydrangea macrophylla plant under
controlled conditions that vary only with regard to soil pH
Question 4:
In some species of bats, adult females regurgitate (bring up food from the
stomach) to feed their young. In addition, adult bats regurgitate to feed
other adults that have not recently eaten. The adults receiving the food
may be unrelated bats who have previously participated in food sharing
and are members of the same social group. Scientists claim that sharing
among unrelated adult bats increases the fitness of the species. Which of
the following best supports the scientists' claim?
Answer:
Bats that do not find food over a 24-hour period may die, preventing their
alleles from being passed on within the social group.
, Question 5:
Testosterone oxido-reductase is a liver enzyme that regulates
testosterone levels in alligators. One study compared testosterone
oxido-reductase activity between male and female alligators from Lake
Woodruff, a relatively pristine environment, and from Lake Apopka, an
area that has suffered severe contamination. The graph above depicts
the findings of that study. The data in the graph best support which of the
following claims?
Answer:
Environmental contamination reduces total testosterone oxido-reductase
activity in females.
Question 6:
Germination would be expected to occur first in which beaker?
Answer:
1
Question 7:
Identify the experimental design that would determine which AIP mimic
would most effectively inhibit the production of hemolysin toxin.
Answer:
Grow S. aureus in separate culture media containing one AIP mimic each
and measure the production of hemolysin toxin. The most effective AIP
mimic will be in the culture producing the lowest amount of hemolysin.
