Life Science Review

The fox and the owl are both -

• seeking shelter
• migrating for winter
• competing for food
• searching for a mate

Every year at the same time hardwood trees in a northern forest lose their leaves.  What causes these trees to lose their leaves in the fall?

• The amount of daylight hours starts to decrease in the fall.
• The amount of carbon dioxide is less in the fall.
• Every fall the trees get a disease that causes them to lose their leaves.
• There is a drought in the forest every fall.

What is the main function of the spines on the prickly pear cactus shown?

• to make food
• to provide shade
• to attract animals
• to protect the plant

Students planted a garden at the beginning of the year.  They made sure that the plants had rich, fertile soil and plenty of water and light.  They added compost that they made from leftover vegetables, eggshells and coffee grounds.  The plants have grown faster than anyone expected.  Which of the following is not a nonliving factor that affected the plants growth?

• soil
• water
• sunlight
• compost

Maple trees and pine trees grow in different environments.  The structures of the leaves on these trees help them survive in their environment.  What is the difference between the maple tree leaf and the pine tree leaf?

• The pine tree leaf does not go through photosynthesis.
• The pine tree leaf is better at conserving water than the maple tree leaf.
• The maple tree leaf is better at conserving water than the pine tree leaf.
• The maple tree leaf does not go through photosynthesis.

Penguins have webbed feet.  In which kind of environment would this structure help a penguin survive?

• tundra
• desert
• ocean
• forest

A tuna is an ocean fish that is well adapted to catching small, fast moving prey.  Which of the following structures most helps a tuna swim fast to catch its prey?

• tough scales
• large fins
• small gills
• streamlined body

Which of the following is an inherited trait of a chimpanzee?

• prefers to eat fruit
• uses twigs as tools
• long black hair
• builds nests in trees to sleep

How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?

• They would produce more offspring.
• They would change the color of their feathers.
• They would experience a decrease in competition.
• They would experience a decrease in available food.

Which human activity in a forest has a positive effect on the ecosystem?

• cutting down trees to make farmland
• planting new trees where old ones were cut down
• clearing the land to build new homes
• building a new highway through the area