Which trait would best help an animal survive in the Sonoran Desert better than other animals?

• a. a layer of blubber
• b. large ears
• c. wings
• d. a long, thin beak

The monkey may become endangered if _______________.

• a. there are too many of them the rainforests
• b. the trees they live in are being cut down
• c. they can find food easily
• d. there is plenty of water

How does competition between animals change the traits of the animals in a population? The animals that have traits making them better adapted to survive will pass those traits on to their _____________ when they reproduce.

• parents
• offspring
• adapt

The leaves of a tree use energy from _____________to make food.

• a. sunlight
• b. carbon dioxide
• c. dirt
• d. water

Living things get food, water, and shelter from their environment. What would happen if the environment changes?

• No animals will survive.
• No plants will survive.
• The living things may have to adapt to the changes.

When plants and animals cannot adapt to their environment, their population _____.

• a. dies off
• b. survives
• c. grows bigger
• d. stays the same

What resources in an ecosystem would an animal need to compete over? (HINT-Choose 3.)

• a. water
• b. carbon dioxide
• c. food
• d. space
• e. sunlight

The living and nonliving things that interact in the environment are called an ____.

• competition
• resource
• ecosystem

A material or object a living thing uses to survive is a __________________.

• competition
• resource
• ecosystem

If a source of food in an ecosystem decreases for a population of snakes, which of the following is NOT LIKELY to happen?

• a. The number of snakes in the population decreases.
• b. Some snakes will move areas to find more food.
• c. Some snakes will try to find a different food source.
• d. The number of snakes in the population increases.