Cactus plants are well suited to survive in the desert. Most cactus plants have a _______ to help them survive in the hot, dry climate.

• sharp spine

• broad leaf

• thick bark

• colorful flower

The _______ of a cactus is to hold water inside the cactus.

• way

• sharp spine

• surface

• function

Which sentence describes the structure and function of a body part that helps an animal survive in a pond? Choose TWO correct answers.

• The raccoon's fur helps it hide underwater in the pond.

• The heron's long legs let it wade into the pond in search of food.

• The duck's webbed feet help it swim through the water.

• The frog's foods include animals that live among the pond's reeds.

How can one structure of cattail plants help other organisms in the marsh ecosystem survive?

• The brown, tube-shaped ends of cattails are flowers that bear seeds.

• The long, thin stems of cattails allow the plant to bend in strong winds.

• The tall, green cattails provide shelter for birds to build nests for their eggs.

• The roots of cattails release a chemical that can prevent new cattails from growing.

The shape of a leaf insect's body is a _______ that helps the insect hide from predators.

• Structure

• Color

• Sound

• Movement

Which behavior is a survival behavior: A young lion cub practices stalking prey through tall grass.

• Non-Survival Behavior

• Survival Behavior

Young elephants push around a log. Is this considered a survival behavior?

• Non-Survival Behavior

• Survival Behavior

A herd of zebras smells lions in the area and runs away. Is this a survival behavior?

• Non-Survival Behavior

• Survival Behavior

A zebra and wildebeest play in the same field together. Is this a survival behavior?

• Non-Survival Behavior

• Survival Behavior

Which animal has paws designed for digging burrows?

• Coyotes

• Prairie dogs

• Owls

• Bison