Williams BIO 1302 Unit 1 Test

Question 1

1.

 

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A biome in which permafrost is expected to occur.

Deciduous forest

Boreal forest

Wetland

Temperate grassland

8 points  

Question 2

1.  

Which of these different ecological systems do we understand the least because of its size and complexity?

Landscape

Ecosystem

Biosphere

Biome

8 points  

Question 3

1.  

What is a type of ecological experiment that takes advantage of a natural disturbance and for which there is no ability to regulate independent variables?

Laboratory experiment

Field experiment

Natural experiment

Computer simulation

8 points  

Question 4

1.  

What is the type of variable in an experiment called the treatment variable?

Independent variable

Dependent variable

Random variable

Response variable

Question 5  

Coral reef decline or dieback is occurring in many areas of the world. Which of the following factors might you suspect to be a major culprit in coral reef decline?

Lack of oxygen

Seawater salinity below 2.7%

Waste build

–

up

Water temperature below 29oC

Question 6

1.  

Match the biome to the corresponding description,

Boreal forest

Arctic tundra

Tropical wet forest

Temperate forest

Subtropical desert

Estuary

Savanna

Wetland

Ocean

Temperate grassland

A.

This biome is identified by its hydrology, hydric soils, and hydrophytic vegetation.

B.

This biome occurs where marine and freshwater habitats meet.

C.

This biome occurs in southern California and along the coast of the Mediterranean Sea.

D.

In summer, surface waters of this biome heat and do not mix with lower, cooler waters.

E.

This biome is dominated by coniferous or evergreen trees.

F.

This biome consists of tropical grassland with widely scattered low trees.

G.

Blood-sucking insects are common in this biome during the brief summer.

H.

This biome covers 70% of the Earth’s surface.

I.

Forests in this biome are dominated by evergreen trees and deciduous trees that drop their leaves in autumn.

J.

Epiphytes are common in this biome.

K.

In North America, the dominant grazer in this biome was the bison.

L.

Xerophytic vegetation is dominant in this biome.

Question 7

Deciduous trees and shrubs shed their leaves seasonally in response to environmental factors. What two biomes have predominantly deciduous vegetation and what are the abiotic factors that affect leaf loss in each of them?
Your response should be at least 200 words in length.

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