Unit 2 Review

Which of the following is a biotic factor?

a. producers b. pH c. water d. humidity e. energy

Which of the following are needed for photosynthesis?

a. Water, solar energy and carbon dioxide b. Water, solar energy and glucose c. Carbon dioxide, energy and glucose d. Oxygen, water and energy e. Oxygen and glucose

Which of the organisms illustrated above would be considered autotrophs?

a. Beetle

b. Bacteria

c. Grass

d. Cheetah

e. Giraffe

Which group of organisms performs photosynthesis?

a. Decomposers

b. Scavengers

c. Heterotrophs

d. Consumers

e. Autotrophs

A wetland ecosystem has an NPP of 1.02 kg C/m2/year and a GPP of 2.80 kg C/m2/year. How much carbon is being used during respiration of autotrophs?

a. 3.82 kg C/m2/year

b. 1.76 kg C/m2/year

c. 1.78 kg C/m2/year

d. 2.86 kg C/m2/year

e. 2.75 kg C/m2/year

During what stage of the hydrologic During what stage of the hydrologic cycle is water released to the cycle is water released to the atmosphere from plants? atmosphere from plants?

a. Evaporation a. Evaporation

b. Transpiration b. Transpiration

c. Precipitation c. Precipitation

d. Infiltration d. Infiltration

e. Condensatione. Condensation

Which of the organisms illustrated Which of the organisms illustrated above would be considered a above would be considered a decomposer? decomposer?

a. Vulture a. Vulture

b. Zebra b. Zebra

c. Hyena c. Hyena

d. Bacteriad. Bacteria

e. Haree. Hare

Organisms that feed on both Organisms that feed on both plants and animals are called plants and animals are called

a. detritus feeders. a. detritus feeders.

b. omnivores. b. omnivores.

c. carnivores. c. carnivores.

d. herbivores. d. herbivores.

e. decomposers.e. decomposers.

Freshly fallen leaves, organic debris, Freshly fallen leaves, organic debris, and partially decomposed organic and partially decomposed organic matter are indicative of the matter are indicative of the

a. surface litter. a. surface litter.

b. zone of leaching. b. zone of leaching.

c. parent material. c. parent material.

d. subsoil. d. subsoil.

e. humus.e. humus.

What relatively recent development What relatively recent development is greatly impacting the carbon is greatly impacting the carbon cycle? a. Photosynthesis cycle? a. Photosynthesis

b. Cellular Respiration b. Cellular Respiration

c. Formation of fossil fuels c. Formation of fossil fuels

d. Combustion of fossil fuels d. Combustion of fossil fuels

e. Formation of carbonate rockse. Formation of carbonate rocks

What is a possible result of an What is a possible result of an increased amount of COincreased amount of CO22 in the in the atmosphere? atmosphere? a. Increased precipitation a. Increased precipitation b. Decreased photosynthesis b. Decreased photosynthesis c. Increase in global temperature c. Increase in global temperature d. Decrease in cellular respiration d. Decrease in cellular respiration e. Increase in formation of fossil e. Increase in formation of fossil fuelsfuels

When nutrients are transported When nutrients are transported through soil with water, this through soil with water, this process is known as process is known as a. Infiltration a. Infiltration b. Percolation b. Percolation c. Decomposition c. Decomposition d. Leaching d. Leaching e. Nitrificatione. Nitrification

What is the major source of phosphorus on What is the major source of phosphorus on land? land? a. Deposition from atmospheric a. Deposition from atmospheric phosphorus phosphorus b. Compounds that are formed by b. Compounds that are formed by autotrophs during photosynthesis autotrophs during photosynthesis c. Compounds released from the c. Compounds released from the weathering of rocks weathering of rocks d. Compounds formed from bacterial d. Compounds formed from bacterial conversion conversion e. Compounds dissolved in precipitatione. Compounds dissolved in precipitation

Which nutrient is most often Which nutrient is most often limiting in aquatic freshwater limiting in aquatic freshwater ecosystems? ecosystems?

a. Nitrogen a. Nitrogen

b. Phosphorus b. Phosphorus

c. Carbon c. Carbon

d. Hydrogen d. Hydrogen

e. Sulfure. Sulfur

In which step of the nitrogen cycle In which step of the nitrogen cycle do plants absorb nitrogen do plants absorb nitrogen compounds? compounds?

a. Nitrification a. Nitrification

b. Denitrification b. Denitrification

c. Assimilation c. Assimilation

d. Ammonification d. Ammonification

e. Nitrogen fixatione. Nitrogen fixation

Which stage of the hydrologic cycle Which stage of the hydrologic cycle can be the most direct cause of algal can be the most direct cause of algal blooms? blooms?

a. Evaporation a. Evaporation

b. Precipitation b. Precipitation

c. Transpiration c. Transpiration

d. Infiltration d. Infiltration

e. Runoffe. Runoff

A group of individuals of the same A group of individuals of the same species occupying a given area at species occupying a given area at the same time is called a the same time is called a

a. species. a. species.

b. population. b. population.

c. community. c. community.

d. genus. d. genus.

e. niche.e. niche.

Which of the organisms illustrated Which of the organisms illustrated above would be the top predator? above would be the top predator?

a. Zebra a. Zebra

b. Hyena b. Hyena

c. Lion c. Lion

d. Cheetah d. Cheetah

e. Giraffee. Giraffe

A community of living organisms A community of living organisms interacting with one another and the interacting with one another and the physical and chemical factors of their physical and chemical factors of their nonliving environment is called a nonliving environment is called a 

a. species. a. species.

b. an ecosystem. b. an ecosystem.

c. a population. c. a population.

d. a lithosphere. d. a lithosphere.

e. a community.e. a community.

The zones that compose a mature The zones that compose a mature soil are known as soil are known as

a. strata. a. strata.

b. profiles. b. profiles.

c. horizons. c. horizons.

d. laminae. d. laminae.

e. samples.e. samples.

Fossil fuels and minerals are Fossil fuels and minerals are found in the found in the

a. atmosphere. a. atmosphere.

b. hydrosphere.  b. hydrosphere.  

c. biosphere. c. biosphere.

d. lithosphere. d. lithosphere.

e. troposphere.e. troposphere.

Organisms that feed on dead Organisms that feed on dead organisms are called organisms are called

a. producers. a. producers.

b. carnivores. b. carnivores.

c. autotrophs. c. autotrophs.

d. scavengers. d. scavengers.

e. omnivores.e. omnivores.

The pyramid which best explains why The pyramid which best explains why there are typically only four to five there are typically only four to five links in a food chain is the pyramid of links in a food chain is the pyramid of

a. energy. a. energy.

b. biomass. b. biomass.

c. numbers. c. numbers.

d. matter. d. matter.

e. productivity.e. productivity.

Nitrogen gas is converted to Nitrogen gas is converted to ammonia through ammonia through

a. nitrification. a. nitrification.

b. nitrogen fixation. b. nitrogen fixation.

c. denitrification. c. denitrification.

d. assimilation. d. assimilation.

e. leaching.e. leaching.

Which of the organisms above would Which of the organisms above would occupy the lowest trophic level? occupy the lowest trophic level?

a. Hyena a. Hyena

b. Cheetah b. Cheetah

c. Vulture c. Vulture

d. Giraffe d. Giraffe

e. Lione. Lion

Which of the following ecosystems Which of the following ecosystems has the lowest level of kilocalories has the lowest level of kilocalories per square meter per year? per square meter per year?

a. open ocean a. open ocean

b. tropical rain forest b. tropical rain forest

c. agricultural land c. agricultural land

d. lakes and streams d. lakes and streams

e. temperate foreste. temperate forest

Which of the following ecosystems has Which of the following ecosystems has the highest the highest average average net primary net primary productivity? productivity?

a. agricultural land a. agricultural land

b. open ocean b. open ocean

c. temperate forest c. temperate forest

d. swamps and marshes d. swamps and marshes

e. lakes and streamse. lakes and streams

As it is weathered, ____ gives rise As it is weathered, ____ gives rise to the C-horizon. to the C-horizon.

a. humus a. humus

b. leaching b. leaching

c. subsoil c. subsoil

d. bed rock d. bed rock

e. B-horizone. B-horizon

The organisms that are classified The organisms that are classified as primary consumers are the as primary consumers are the

a. detritivores. a. detritivores.

b. omnivores. b. omnivores.

c. carnivores. c. carnivores.

d. herbivores. d. herbivores.

e. decomposers.e. decomposers.

Which of the organisms illustrated above would be considered primary consumers? a. Cheetah

b. Rabbit

c. Lion

d. Vulture

e. Beetle

The dissolving of material from the The dissolving of material from the upper layers of the soil and its upper layers of the soil and its movement to lower horizons is called movement to lower horizons is called

a. percolation. a. percolation.

b. weathering. b. weathering.

c. accumulation. c. accumulation.

d. leaching. d. leaching.

e. humus.e. humus.

The major plant nutrient most The major plant nutrient most likely to be a limiting factor in likely to be a limiting factor in saltwater is saltwater is

a. phosphorous. a. phosphorous.

b. calcium. b. calcium.

c. manganese. c. manganese.

d. potassium. d. potassium.

e. nitrogen.e. nitrogen.

Organisms that complete the final Organisms that complete the final breakdown and recycling of organic breakdown and recycling of organic materials from the remains or wastes of materials from the remains or wastes of all organisms are called all organisms are called

a. detritivores. a. detritivores.

b. carnivores. b. carnivores.

c. decomposers. c. decomposers.

d. scavengers. d. scavengers.

e. omnivores.e. omnivores.

The The mostmost common gas in the common gas in the atmosphere is atmosphere is

a. nitrogen. a. nitrogen.

b. carbon dioxide. b. carbon dioxide.

c. oxygen. c. oxygen.

d. hydrogen. d. hydrogen.

e. helium.e. helium.

Computer models suggest that adding Computer models suggest that adding carbon dioxide to the atmosphere carbon dioxide to the atmosphere could could

a. reduce the natural greenhouse a. reduce the natural greenhouse effect. effect.

b. increase food production. b. increase food production.

c. raise sea level. c. raise sea level.

d. stabilize climate patterns. d. stabilize climate patterns.

e. decrease food production.e. decrease food production.

Carbon is a major component of Carbon is a major component of

a. atmospheric gases. a. atmospheric gases.

b. sedimentary rocks. b. sedimentary rocks.

c. the oceans. c. the oceans.

d. organic compounds. d. organic compounds.

e. water cycle.e. water cycle.