Competition is a driving force behind natural selection. Which of these statements best describes why competition is a constant pressure?

all of the choices

*100% CORRECT ANSWERS

Question 1  

The principal characteristic that differentiates temperate and tropical rainforests is .

latitude

Question 2

Which of the following are important products of rainforests?

all of the choices

Question 3

Which of the following best describes the use of rainforest plants as anticancer drugs?

Twenty-five percent of the active ingredients in cancer drugs are exclusively rainforest plants.

Question 4

Which of the following is the most direct method for combating rainforest deforestation?

rehabilitation

Question 5

The sustainable use of rainforest resources is exemplified by .

harvesting nuts

Question 6

Which of the following best describes the impact of rainforest deforestation on global precipitation?

The pattern of global precipitation is altered.

Question 7

A forester is

a person who manages and supervises land used for timber production

Question 8

Which of the following is a technology used by foresters?

all of the choices

Question 9

Even-aged management practices involves clearing trees that .

are all near the same age

Question 10

Which of the following forest management practices is best for reestablishing areas of forest?

reforestation

Question 11

How do trees act as carbon sinks?

all of the choices

Question 12

How does the destruction of forests contribute to levels of atmospheric carbon?

Fewer trees leads to smaller amounts of carbon dioxide being absorbed from the atmosphere.

Question 13

What fraction of the fossil fuel emissions in the United States could be absorbed by converting 25% of agricultural land in the U.S. to native forests?

approximately 20%

Question 14

Why is clearcutting an especially damaging forestry practice for species that rely upon older trees for their survival?

Clearcutting removes all trees in a stand, old and young.