객관식
Which of the following best describes the difference between primary and secondary succession in an ecosystem?
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48. Ecology
Introduction to Ecology
객관식
Which of the following types of pheromones helps regulate population density in certain animal species?
A
Primer pheromones
B
Territorial pheromones
C
Sex pheromones
D
Alarm pheromones
검증된 단계별 안내1
Understand the concept of pheromones: Pheromones are chemical signals released by animals that influence the behavior or physiology of other members of the same species. They play a role in communication and can serve various functions such as mating, warning, or marking territory.
Learn about the specific types of pheromones: Primer pheromones cause long-term physiological changes in the recipient, while other types like sex pheromones, alarm pheromones, and territorial pheromones have more immediate behavioral effects.
Focus on the role of primer pheromones: Primer pheromones are known to regulate population density by influencing reproductive physiology or development in a population. For example, they may suppress or stimulate reproduction in response to environmental conditions or population size.
Compare primer pheromones to other types: Territorial pheromones mark boundaries to prevent overcrowding, sex pheromones attract mates, and alarm pheromones warn others of danger. None of these directly regulate population density in the same physiological way as primer pheromones.
Conclude that primer pheromones are the correct answer because they specifically help regulate population density by causing long-term physiological changes in the population.
