APES Unit 1 Practice Quiz 1

Which of the following are the reactants in the process of photosynthesis, used by producers to create their own energy?

 

 

• Water and carbon dioxide

• Water and oxygen

• Oxygen and carbon dioxide

• Glucose and oxygen

Which of the following play a role in the natural greenhouse effect necessary for warming the earth? I. Carbon dioxide in the troposphere

II. Water vapor in the troposphere

III. Ozone in the stratosphere

• I only

• II only

• III only

• I and II

Which of the following is matched correctly?

• Cyanobacteria – producer

• Field mouse – tertiary consumer

• Tiger – primary consumer

• Mushroom – producer

The release of heat illustrated in this food web is a direct result of the

• Law of conservation of matter

• Law of conservation of energy

• First law of thermodynamics

• Second law of thermodynamics

The organisms directly responsible for recycling the nutrients that flow through this food chain are the

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Decomposers and detritus feeders

If a habitat contained 40,000 kg of the producers, what biomass of secondary consumers would be expected to be able to survive in this same habitat?

• 40000

• 4000

• 400

• 40

All of the following statements about net primary productivity are correct EXCEPT

• Net primary productivity is the rate at which producers convert solar energy into chemical energy

• Net primary productivity reflects the amount of producer biomass available to consumers.

• Net primary productivity is always a smaller value than gross primary productivity.

• The open ocean has a low net primary productivity but produces most of the producer biomass on earth.

An ecologist samples 10 quadrats, each with an area of 2 hectares. She is interested in two species, live oak and juniper, and how a prescribed fire will affect their populations. She counts a total of 160 live oaks and 380 junipers prior to the burn. She samples the same quadrats five years after the burn and counts 100 live oaks and 80 junipers. Calculate the percent change in the number of junipers after the prescribed fire.

 

• 21%

• -21%

• 79%

• -79%

“Ecologists view elephants as a keystone species in the African savanna. They eat woody shrubs and young trees. This helps keep the savanna from being overgrown by these woody plants and prevents the grasses, which form the foundation of the food web, from dying out. If they were to die out, antelopes, zebras, and other grass-eaters would leave the savanna in search of food and with them would go the carnivores, such as lions and hyenas, that feast on these grass-eaters. Elephants also dig for water during drought periods, creating or enlarging waterholes that are used by other animals. Without African elephants, savanna food webs would collapse and the savanna would become shrubland.” According to the passage, the trophic cascade that would ensue if the African elephant disappears would begin with the

• Competition between predators for prey species.

• Loss of native grasses as the uneaten trees and shrubs become invasive

• Loss of native trees and shrubs, leaving other herbivores without food.

• Competition between large herbivores for shade during the hot daytime temperatures. 

Dominated by evergreen species; characterized by cold, snowy winters and dry summers

• temperate rainforest

• chaparral

• savanna

• taiga