Biodiversity — Unit test Answers

Which organism has a backbone?

A caterpillar has an exoskeleton and feeds on many leaves before it makes a cocoon and becomes a butterfly.Which type of organism is a caterpillar?

An ocean food chain is shown.

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Kendra is studying the energy pyramid shown.

During one year, seven coyotes in a population die. Eight immigrate into the population, but none emigrate.If the overall population growth is 13 coyotes, what was the birth rate of coyotes during the year?Use this formula:population growth = (birth rate + immigration) – (death rate + emigration)

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Which represents the size of a population?

A gecko is a type of reptile. How does a gecko most likely respond to cold air temperatures?

After Dante catches the flu virus, he feels very tired and loses his appetite. His body aches and he gets a high fever.Which best describes Dante’s symptoms?

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Which is the best example of a response to an external stimulus?

Which organism is a producer?

What is the source of energy in most ecosystems?

Why are nonnative species a threat to biodiversity?

Each year, as winter approaches, some species become inactive. They may sleep and use their body’s fat for energy during the cold season.What is this behavior called?

Population X and Y live in the same area. The size of population X increases over time. As a direct result, the size of population Y decreases.Which is most likely the limiting factor of population Y?

Which best describes the carrying capacity of an environment?

GymnospermsAngiospermsFernsMosses

Which statement best describes an organism's life cycle?