8/16 - Competition in Ecosystems

Hawks and brown bears live together in the same habitat. There will be competition between the hawks and the brown bears only if which of the following is true?

• Brown bears hibernate during the winter while hawks remain active.

• Pesticides in the fish population affect hawks’ eggs and decrease their population.

• Both brown bears and hawks feed on the same species of fish.

• Both Shanna and Savanna feed on the same species of snakes.

An increase in which of the following factors is likely to contribute to competition between two members of the same species living in a certain habitat?

• Available food resources

• Population of the species

• Annual snowfall

• Overall size of the habitat

In an ecosystem, what do organisms and populations with similar needs compete over?

• food

• water

• shelter

• all of the above

Two species of fish live in the same pond. Which of the following would increase competition between these two species of fish?

• Habitat temperature increases.

• Population of birds that eat the fish increases.

• Number of food plants the fish eat increases.

• Water level in the pond decreases.

What is most likely to occur if different plant species compete for the same requirements in an ecosystem?

• One species will be eliminated from the ecosystem.

• The species will develop different requirements.

• The species will alter the environment so that both survive.

• One species will adapt to a different environment.

If a forest has many large trees with lots of leaves, what will most likely be found on the ground?

• Very few small plants, because the trees block all the sunlight.

• Lots of small plants, because the big trees provide more oxygen.

• Very few small plants. because the trees use up all the oxygen.

• Lots of small plants, because the trees provide enough water.

Which two species most likely compete for water? (more than one answer)

• X

• Y

• Z

In a forest, two trees are growing next to each other. Which of the following describes two natural resources that both trees compete for in this area?

• Sunlight and water

• Root length and strength

• Cellular structure and function

• Access to nesting birds and insects

An organism that cannot adapt to changes in the environment will most likely - 

• produce more offspring
• die
• change its traits to survive
• store more food

Changes to an environment may make it more difficult for an organism to find-

• food.

• shelter.

• water.

• all of the above