Life Sci Review

Which of the following describes a population?

   

   

• corals, sponges, algae, reef fish, lobsters, and giant clams

• 85 great white sharks off Cape Cod

•   a mating pair of seagulls migrating to an island

• thousands of dolphins and whales around Hawaii

Which of the following is a biotic factor that might limit a population of mice?

•    owls that prey on the mice

•        rocks in which the mice can hide from predators

•       rainy weather that floods the mice’s nests

• water for the mice to drink

In terms of its effect on population, which factor is most similar to birth rate?

• carrying capacity

• emigration

• density

•     immigration

What do consumers release as they break down food to obtain energy?

• oxygen

• free nitrogen

• carbon dioxide and water

• sugar

Rain, hail, and snow are all examples of

• evaporation

• erosion

• precipitation.

• condensation.

In one form of nitrogen fixation, the __________ energy of __________ splits nitrogen molecules into atoms.

   

• released, bacteria

• electrical, lightning

• mechanical, consumers

• chemical, water vapor

Which of the following terms describes a straight series of connections among organisms that feed on each other?

• ecosystem

• food chain

• community

• food web

Mushrooms and bacteria are important

• predators

• producers

• herbivores

• decomposers

What is a food web?

• A linear sequence of organisms where each is eaten by the next one in the chain.

• A map that tracks the migration patterns of different species within an ecosystem.

• A network of interconnected food chains showing the feeding relationships among various organisms in an ecosystem.

• A diagram that shows the energy transfer between producers and consumers in an ecosystem.

What is an energy pyramid?

• A graph that shows the number of individuals at each trophic level in an ecosystem.

• A chart that illustrates the life span of various organisms within an ecosystem.

• A diagram that shows the amount of energy that moves from one trophic level to another in a food web.

• A representation of the physical locations where different species live within an ecosystem.