1. The nettle plant has spines that protect it against animals.

True
False

2. All plants need roots to obtain nutrients in order to live and grow.

True
False

3. Some plants digest animals to supplement the nutrients they get from the soil.

True
False

4. Plants make their own food by using the sunlight to make salt.

True
False

5. During photosynthesis, all plants make the same kind of sugar.

True
False

6. When plants make food, they release oxygen into the air.

True
False

7. Which of the following is correct about how plants relate to animals in the EarthÕs system?

Plants take in nitrogen that is given off by animal respiration.
Plants take in carbon dioxide given off by animals, fungi, and other plants.
Animals use carbon dioxide that is given off by plants during photosynthesis.
Plants depend on animals for sunlight and chlorophyll that are used during photosynthesis.

8. Which of the following methods is used by plants to disperse their seeds widely?

Wind
Sticking on animal fur
Traveling through an animalÕs digestive system
All of the above

9. Which of the following are correct structures and functions of desert plants?

Desert plants can store water in their fleshy stems and pads.
Cactus spines are used to attract animals.
The cactus spines are excellent at releasing water.
All of the above.

10. Which of the following correctly explains how the plant obtains its energy?

Plants get their energy from an extensive root system.
Energy enters the plant when sunlight is trapped by chlorophyll.
Energy is obtained when carbon dioxide is changed into sugar.
All of the above.

Your score is out of 10.