TRF Unit 1 Characteristics of tropical rainforests 1.3

1. The tree crowns of the ___________ form a dense and continuous layer.

• A. emergent layer

• B. canopy layer

• C. understorey

• D. shrub layer

2. Which of the following about the layered structure of tropical rainforests is INCORRECT?

• A. Five layers can be identified.

• B. The crowns of trees of understorey are oval in shape.

• C. The trees of the emergent layer are sparsely distributed.

• D. The shrub layer is composed of ferns and herbs.

3. Tropical rainforests are homes to two-thirds of the world’s plants and animal species.

• A. True

• B. False

4. Which of the following is the function of drip-tip leaves?

• A. To compete for sunlight

• B. To stand against strong winds

• C. To shed rainwater quickly

• D. To reduce water loss from transpiration

5. Which of the following is NOT a characteristic of the plant shown in the photo below?

• A. It has developed buttress roots to support itself.

• B. It is a type of climbers.

• C. It can carry out photosynthesis by itself.

• D. It winds up a tree for more sunlight.