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24 Aug 2021, 01:21
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1. Which of the following best summarizes the main point of the passage?
(A) Species interdependence is a point of weakness for some plants, but is generally beneficial to insects involved in pollination.
(B) Efforts to control the spruce budworm have had deleterious effects on the red-osier dogwood. - Not main point. Red-osier is an example.
(C) The used of pesticides may be endangering certain plant species dependent on insects for pollination.
(D) The spraying of pesticides can reduce the fecundity of a plant species, but probably does not affect its overall population stability.
(E) Plant species lacking key factors in their defenses against human-environmental disruption will probably become extinct. - No info
2. According to the author, a flowering plant species whose fecundity has declined due to pesticide spraying may not experience an overall population decline if the plant species can do which of the following?
(A) Reproduce itself by means of shoots and runners.
If, on the other hand, vegetative growth and dispersal (by means of shoots or runners) are available as alternative reproductive strategies for a species, then decreases in plant fecundity may be of little consequence
(B) Survive to the end of the growing season.
(C) Survive in harsh climates.
(D) Respond to the fecundity decline by producing more flowers.
(E) Attract large insects as pollinators.
3. The passage suggests that the lack of an observed decline in the fecundity of the creeping dogwood strengthens the researchers conclusions regarding pesticide use because the
(A) creeping dogwood is a species that does not resemble other forest plants
(B) creeping dogwood is a species pollinated by a broader range of insect species than are most dogwood species
(C) creeping dogwood grows primarily in regions that were not sprayed with pesticide, and so served as a control for the experiment
(D) creeping dogwood is similar to the red-osier dogwood, but its insect pollinators are known to be insensitive to the pesticide used in the study
The creeping dogwood, a species similar to the red-osier dogwood, but which is pollinated by large bees, such as bumblebees, showed no significant decline in fecundity.
(E) geographical range of the creeping dogwood is similar to that of the red-osier dogwood, but the latter species relies less on seeds for reproduction
(A) Species interdependence is a point of weakness for some plants, but is generally beneficial to insects involved in pollination.
(B) Efforts to control the spruce budworm have had deleterious effects on the red-osier dogwood. - Not main point. Red-osier is an example.
(C) The used of pesticides may be endangering certain plant species dependent on insects for pollination.
(D) The spraying of pesticides can reduce the fecundity of a plant species, but probably does not affect its overall population stability.
(E) Plant species lacking key factors in their defenses against human-environmental disruption will probably become extinct. - No info
2. According to the author, a flowering plant species whose fecundity has declined due to pesticide spraying may not experience an overall population decline if the plant species can do which of the following?
(A) Reproduce itself by means of shoots and runners.
If, on the other hand, vegetative growth and dispersal (by means of shoots or runners) are available as alternative reproductive strategies for a species, then decreases in plant fecundity may be of little consequence
(B) Survive to the end of the growing season.
(C) Survive in harsh climates.
(D) Respond to the fecundity decline by producing more flowers.
(E) Attract large insects as pollinators.
3. The passage suggests that the lack of an observed decline in the fecundity of the creeping dogwood strengthens the researchers conclusions regarding pesticide use because the
(A) creeping dogwood is a species that does not resemble other forest plants
(B) creeping dogwood is a species pollinated by a broader range of insect species than are most dogwood species
(C) creeping dogwood grows primarily in regions that were not sprayed with pesticide, and so served as a control for the experiment
(D) creeping dogwood is similar to the red-osier dogwood, but its insect pollinators are known to be insensitive to the pesticide used in the study
The creeping dogwood, a species similar to the red-osier dogwood, but which is pollinated by large bees, such as bumblebees, showed no significant decline in fecundity.
(E) geographical range of the creeping dogwood is similar to that of the red-osier dogwood, but the latter species relies less on seeds for reproduction
16 Jun 2022, 03:03
Kudos
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Hi expert,
Can any expert explain Q6? I was torn by C and D. As passage says short life span is a disadvantage character, and C says tree with short-live.
While D says a large number of pollinators, that should be an advantage character. So how to compare C to D? Thanks in advance.
Can any expert explain Q6? I was torn by C and D. As passage says short life span is a disadvantage character, and C says tree with short-live.
While D says a large number of pollinators, that should be an advantage character. So how to compare C to D? Thanks in advance.
16 Jun 2022, 03:38
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Mavisdu1017
Which of the following plant species would be LEAST likely to experience a decrease in fecundity as a result of the spraying of a pesticide not directly toxic to plants?
Focus on the BIG IDEA:
Species interdependence can become a point of weakness when one species involved in the relationship is affected by a catastrophe. Thus, flowering plant species dependent on insect pollination could be endangered when the population of insect-pollinators is depleted by the use of pesticides.
Implication:
A plant species NOT dependent on insect-pollinators would be LEAST likely to be affected by the use of pesticides.
Of the five answer choices, only C refers to a plant species not dependent on insect pollination:
a wind-pollinated flowering tree that is short-lived
Quote:
According to the passage, plants most at risk have ALL FOUR of the following characteristics: a short life span, a narrow geographic range, an incapacity for vegetative propagation, and a dependence on a small number of insect-pollinator species.
The passage does not say that a short life span ON ITS OWN is a disadvantage.
