Ecology Review 2024

Which of the following descriptions about the organization of an ecosystem is correct?

• Communities make up species, which make up populations.
• Populations make up species, which make up communities.
• Species make up communities, which make up populations.
• Species are grouped in populations, which make up communities.

The simplest grouping of more than one kind of organism in the biosphere is a(an)

• population.
• community.
• ecosystem.
• species.

The algae at the beginning of the food chain are

• consumers.
• decomposers.
• producers.
• heterotrophs.

The algae at the beginning of the food chain are

• consumers.
• decomposers.
• producers.
• heterotrophs.

If the dragonfly died what impact would if have on the rest of the species?

• There would be an increase in frogs.
• There would be a decrease in frogs.
• There would be an increase in corn.
• There would be an decrease in butterflies.

An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)

• heterotroph.
• consumer.
• detritivore.
• autotroph.

The total amount of living tissue within a given trophic level is called the

• organic mass.
• trophic mass.
• energy mass.
• biomass.

What animals eat both producers and consumers?

• herbivores.
• omnivores.
• chemotrophs.
• autotrophs.

A snake that eats a frog that has eaten an insect that fed on a plant is a

• producer.
• primary consumer. (1st level consumer)
• secondary consumer. (2nd level consumer)
• tertiary consumer. (thrid level consumer)

The tropic levels in the ecological pyramid illustrate

• the relative amount of energy.
• the amount of living organic matter.
• the relative number of individual organisms.
• that producers outnumber first-level consumers.