unit 10 lesson 4 & unit 11 lesson 1

Jake found that more than half the students in his class have brown eyes. How is eye color in humans classified?

• behavior

• characteristic

• structure

• trait

Animals in the wild learn to do many things. When do most animals learn their behaviors?

• when they are born

• when they are adult

• when they are young

• when they get a reward

One kind of moth lives on the bark of trees. In are􀁑 where the trees and moths are located near factories, their color is dark. Where there are n􀁘 factories, the same kinds of moths and trees are light colored. What is the most likely cause for this change in color?

• diet

• instinct

• environment

• learned behavior

Canada geese travel north when the weather gets warm in the spring. Then they travel south when it gets cold in the late fall. Suppose that the spring temperature stayed cold two weeks longer than usual. How would that change the behavior of the geese?

• They would not travel north at all.

• They would travel north at the usual time.

• They would travel north about two weeks later.

• They would travel north about two weeks earlier.

Hurricanes in Florida damage trees. If a pine tree loses half of its branches, what will its offspring look like?

• They will have no branches.

• They will have twice as many branches.

• They will have the normal number of branches.

• They will have half the normal number of branches.

In a forest, there is little growth of plants during winter. What is the main reason this would affect deer in the forest?

• There would be less food.

• There would be less water.

• There would be less shade.

• There would be less shelter.

It is spring, and Yi Min is going on a nature walk. Which of the following will Yi Min most likely see?

• budding plants

• dormant plants

• plants dropping fruit

• plants losing their leaves

Aaron is visiting a national park. The ranger tells Aaron that he is unlikely to see any ground squirrels because it is winter. Which of the following is the most likely reason Aaron would not see any ground squirrels?

• The ground squirrels migrated.

• The ground squirrels have died out.

• The ground squirrels are hibernating.

• The ground squirrels are gathering food.

During the spring, bears eat mainly grass. During-the summer, bears also eat birds' eggs and fish. During the fall, bears eat ripe berries. Why do bears change their diet during the seasons?

• Each food offers different nutrients.

• Different food is available each season.

• Bears live in different areas each season.

• Bears like more food in the spring and summer.

In the fall, whooping cranes migrate from Wisconsin to Florida. What is the main reason the cranes leave Wisconsin for Florida?

• A. Wisconsin's ground freezes, and the birds cannot get any food.

• B. Wisconsin is too hot in the winter, and the birds prefer cool weather.

• C. Florida receives one kind of sunlight, and Wisconsin receives another kind.

• D. Florida has more rain in the winter, and Wisconsin only gets a small amount of rain.