C4.1 Population and Communities

Quadrats are normally used for which type of organisms?

• Motile

• Sessile

• Flying

• Aquatic

Which phase of population growth is associated with newly discovered niche or land?

• Exponential phase

• Transitional phase

• Plateau phase

• Decline phase

Within a few decades, what type of ecosystem was established around Mount Saint Helens?

• Desert

• Tundra

• Grassland and shrub

• Rainforest

Which of the following scenarios is an example of intraspecific competition?

• Two trees competing for sunlight

• Different species of birds nesting in the same area

• Predators hunting the same prey

• Various fish species using the same coral reef

Which of the following is an example of bottom-up control?

• Herbivores controlling plant populations

• Availability of sunlight affecting plant growth

• Predators reducing prey numbers

• Omnivores eating both plants and animals.

Which of the following is a characteristic of top carnivores in a trophic pyramid?

• They are primary producers

• They are secondary consumers

• They are tertiary consumers

• They are herbivores.

Which of the following is an approach to test for interspecific competition?

• Field observation by random sampling

• Genetic analysis

• Behavioral study

• Climate modeling

What is a common method for estimating population size in ecology?

• Mark and recapture

• Genetic sequencing

• Satellite imaging

• Climate modeling

Which factor is most likely to lead to a population bottleneck?

• Abundant resources

• Genetic diversity

• Natural disaster

• Stable climate

Which of the following is an example of mutualism?

• A lion hunting a zebra

• A bee pollinating a flower

• A parasite living on a host

• A bird eating seeds