Science Review

Choose as many of the following steps which are part of the life cycles of all living things:

• All living things develop in a life cycle

• All living things hatch from eggs

• All living things die

• All living things form flowers

• All living things mature into adults

The tree below shows several labeled structures. Which structure helps the tree live in an environment where it only rains sometimes?

• Branches, because they hold the leaves up to the light

• Leaves, because they use sunlight to make food

• Roots, because they take water from the ground

• Fruit, because seeds are carried away to make new trees

Look at the images below. Which foot would most likely belong to a bird that lives in a pond environment?

• A.

• B.

• C.

• D.

Heavy rains flooded the area in the picture above. How might the floods affect the organisms that live there?

• More water will cause animals to grow faster.

• All of the organisms will perish in the wet conditions.

• The flood will not affect the organisms that live in the area.

• Some organisms will leave the area to find a dry environment.

There has been reduced rainfall in the area. A drought occurs at the pond. What is the most likely way the drought will affect the animals in the above ecosystem?

• The frogs will move.

• The dragonflies will thrive.

• The fish will die.

Which organism in this food chain is the producer?

• seaweed

• clam

• starfish

• seagull

The roadrunner is a desert bird that eats fruits and seeds. It also eats insects, spiders, scorpions, and rattlesnakes. What would likely happen if the roadrunner population disappeared from its ecosystem?

• A. There would be no more fruits or seeds.

• B. There would be a decrease in spider populations.

• C. There would be an increase in scorpion populations.

In the food chain shown in the diagram, from where does the energy originate?

• grass

• sun

• grasshopper

• owl

In which Biome can you find cactus, roadrunners., tarantulas, and coyotes?

• Desert

• Tundra

• Rainforest

• Saltwater

Which of these is an example of a decomposer?

• Cactus

• Coyote

• Mosquitos

• Mushroom