Unit 2 Review

About half of Earth's tropical rainforests have been destroyed by _______ and ________.

• Forest fires; Urban development

• Pollution; Forest fires

• Agriculture; Urban development

• Agriculture; Pollution

Over time, many ______________ have been drained or filled to grow crops.

• Inland wetlands

• Mountains

• Forests

• Grasslands

Which of the following is an example of resource partitioning?

• Populations of a species become separated by a mountain range.

• A species evolves to eat many different kinds of food.

• Populations of a species evolve to eat insects on different parts of trees

• An organism feeds on another organism usually by living on or inside the host.

Which type of species is sensitive to environmental changes?

• indicator

• generalist

• keystone

• specialist

What process favors individuals that can survive the existing environmental conditions?

• Natural selection

• Speciation

• Extinction

• Geographic isolation

Reproductive isolation leads to

• Geographic isolation

• Speciation

• Extinction

• Crossbreeding

Which one of these is considered artificial selection?

• Selective breeding

• Synthetic biology

• Natural selection

• Geographic isolation

What would cause a rainforest to reach the point where it cannot be restored by secondary succession?

• The destruction of all of its vegetation

• The destruction of all of its animals

• The extinction of one species of plant or animal

• The arrival of an invasive species

As moist air blowing inland from an ocean reaches a mountain range, __________.

• it expands and disperses, preventing rainfall

• it rises, expands, and cools, losing moisture as rain and snow

• it descends, contracts, and warms, losing moisture as rain

• its movement is halted, preventing the mixing of air masses on either side

The transition zone between biomes tend to have _________.

• A lot of rainfall

• The greatest biodiversity

• The highest temperatures

• The most grasslands