CH 5 Diversity of Living Things Test

The long necks and legs of giraffes help them reach the leaves of tall trees. If the trees of the environment gradually became even taller, which change to the giraffe population would most likely occur?

• Giraffes would stay the same height and then die out.

• Most of the giraffes would grow taller to reach the taller trees.

• The tallest giraffes would be more likely to survive and reproduce.

• The tallest giraffes would share their food with shorter giraffes.

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Mrs. Nichols enjoys walking in a meadow near her house. Throughout one summer, she notices large numbers of clover with purple flowers. In earlier years, white was the more common flower color for clover. Which is the most likely explanation for her observation?

• Animals that pollinate white clover died or left the meadow.

• Animals that prefer to eat purple clover arrived in the meadow.

• The clover that makes white flowers is an invasive species in the meadow.

• A mineral in the soil determines flower color in clover.

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Some rabbits have ears that are unusually long and thin. These ears are adaptations that help the rabbit lose body heat and stay cool. Which rabbit is most likely to have long, thin ears?

• A rabbit that is native to the cold Arctic tundra.

• A rabbit that is native to the hot deserts of Arizona.

• A rabbit that was captured in the cold Arctic tundra and brought to a zoo in Florida.

• A rabbit that is larger and heavier than a typical rabbit.

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Most leaves have tiny holes or gaps on their bottom side, or side that faces away from the Sun. The holes allow gases to travel between the leaf and the air. Which plant benefits from the adaptation of holes on the top side of the leaf, or the side that faces the Sun?

• Dandelions, which hold leaves at the bottom of their stem.

• Aspen trees, which have leaves that blow gently in the wind.

• Water lilies, which have broad, flat leaves that float on the water.

• Many house plants, which are raised in pots indoors.

The snowshoe hare lives in the Arctic tundra, a region with cold, snowy winters. Observe the snowshoe hare in summer and in winter. Why is the change in fur color an example of an adaptation?

• The color change helps the hare stay warm throughout the year.

• The color change is a choice that the hare makes each year.

• The color change tells other animals that the season is changing.

• The color change helps the hare hide from enemies throughout the year.

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Giraffes get food from the tops of the acacia trees in their environment. What events caused the neck length of giraffes to increase, allowing them to reach the high leaves? Select three correct answers.

• A. Acacia trees became taller in the giraffe’s environment.

• B. Short trees became more common in the giraffe’s environment.

• C. Giraffes with long necks had an advantage in the environment.

• D. Giraffes began stretching their necks longer and longer.

• E. Giraffes with long necks were more likely to pass their traits to the next generation.

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Brendan is comparing the different ways that animals respond to changes in their environment. What do migration and hibernation have in common with each other?

• Both slow down the body functions of an animal.

• Both allow an animal to avoid living in a cold, snowy winter.

• Both are used only by large animals, such as bears and elephants.

• Both may help an animal survive cold winter weather, when food is scarce.

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Mangrove trees are one of the few types of plants that can grow in salty water. What adaptations allow mangrove trees to survive in a salty environment?

Answer explanation

Its roots have adapted to grow in salt water. Its roots have adapted to filter out most of the salt, and its leaves have small glands that help get rid of salt that gets absorbed.