Study Guidefor Ch 6

Env. Sci.

Study Guidefor Ch 6.

Name: ______Date: ______Period: ______

Multiple Choice Questions
1.Which biome is characterized by organisms which are inactive during the day and burrow underground?
A.tundra
B.taiga
C.rainforest
D.desert

2.Which biome is characterized by tree frogs, large vines, and fruit-eating birds and bats?
A.grassland
B.savanna
C.tropical rainforest
D.tundra

3Which biome is characterized by having no reptiles or amphibians and an abundance of migratory waterfowl?
A.desert
B.tundra
C.taiga
D.grassland

4.The two major factors influencing vegetation in biomes are
A.precipitation and temperature.
B.soil fertility and hydrology.
C.day length and climate.
D.topography and soil type.

5.Savannas are found in
A.Europe.
B.tropical parts of Africa.
C.Canada.
D.None of these are correct.

6.Mediterranean Shrublands (Chaparral) have been heavily impacted by humans because
A.they are near the oceans.
B.have a moderate climate.
C.both they are near the oceans and have a moderate climate.
D.None of these are correct.

7.Human impact on temperate forests include
A.farming.
B.logging.
C.population centers.
D.All of these are correct.

8.Oceans cover approximately
A.40% of the earth's surface.
B.50% of the earth's surface.
C.60% of the earth's surface.
D.70% of the earth's surface.

9.Which group of organisms forms the base of the energy pyramid in a pelagic marine ecosystem?
A. phytoplankton
B.zooplankton
C.bacteria
D.sea grass

10.In desert biomes, flowering usually coincides with
A.moisture availability.
B.Santa Ana winds.
C.cool summers.
D.migration of monarch butterflies.

11.Which of the following is NOT a threat to tropical rainforests?
A.logging
B.ranching
C.agriculture
D.All are threats.

12.Which of the following is NOT true of climax communities?
A.They have fewer types of interactions among organisms.
B.They have more kinds of organisms.
C.They are in energy balance.
D.They are able to maintain their mix of species.

13.Which is an example of secondary succession?
A.bare rock
B.a burned field
C.standing water
D.pure sand

14.Primary succession is
A.a progression that begins with a total lack of organisms.
B.of very short duration.
C.a progression that begins with destruction of an existing ecosystem.
D.All of these are correct.

15.Development and impact on desert areas is mainly due to
A.air conditioning.
B.roads and highways.
C.modern irrigation.
D.None of these are correct.

16.What is the dominant organism colonizing bare rock during primary succession?
A.bacteria
B.algae
C.lichens
D.submergent plants

17.Each stage in the process of succession is called a

A.seral stage.
B.primary stage.
C.reef-forming stage.
D.None of these are correct.

18.Ecologists have learned that succession is influenced by many factors other than climate alone including
A.rainfall and temperature patterns.
B.invasive species, disease, human land use history, and seed dispersal.
C.biogeochemical cycles, available oxygen, and superfund sites.
D.slope, wind patterns, and toxicity levels.

19.A floating bog is an example of
A.secondary succession.
B.aquatic primary succession.
C.terrestrial primary succession.
D.None of these are correct.

20.Which of the following is NOT a region in a lake ecosystem?
A.limnetic zone
B.pelagic zone
C.euphotic zone
D.littoral zone

21.Shallow, warm, nutrient-rich lakes are described as
A.oligotrophic.
B.benthic.
C.eutrophic.
D.limnetic.

22.What is the term used to describe a shallow, partially enclosed area where freshwater enters the ocean?
A.coral reef
B.abyssal ecosystem
C.mangrove swamp
D.estuary

23.Seaweed and other attached marine organisms prefer to grow in which of the following regions?
A.benthic
B.pelagic
C.abyssal
D.neritic

24.Conservation easements can
A.decrease the economic value of a tract of land.
B.restrict access in order to protect endangered species.
C.prohibit the subdivision or development of a tract of land.
D.All of these are correct.

25.Plants in this biome have features to survive long drought even though rainfall totals can be as high as 250 cm in a given month.
A.savanna
B.tundra
C.desert
D.tropical dry forest

26. Which of the following organisms only function in the euphotic zone?
A. seaweed
B. crabs
C. phytoplankton
D. fish

Which of the following best matches the description?

27.Biome that lacks trees and has permanently frozen soil.______

28.Photosynthetic free-floating marine organisms.______

29.Upper layer of the ocean where the sun's rays penetrate.______

30.Early stages of succession that begin the soil-building process.______

31Organisms that swim in the open ocean water.______

32.Organisms that live on the bottom of marine or freshwater ecosystems.______

33.Attached organisms in freshwater streams and rivers.______

34.Amount of oxygen required to destroy organic molecules in aquatic ecosystems.______
A.phytoplankton
B.littoral zone
C.desert
D.pioneer community
E.grassland
F.boreal forest
G.pelagic
H.tundra
I.benthic
J.deciduous forest
K.biochemical oxygen demand
L.periphyton
M.marsh
N.savanna
O.euphotic zone

True / False Questions

35.Ecologists have discovered that the process of succession is very predictable.
TrueFalse

36.Taiga, Northern Coniferous Forest, and Boreal Forest are names for the same type of biome.
TrueFalse

37.Hurricanes, flooding, and fire are examples of disturbances which result in secondary succession.
TrueFalse

38.In general, the soil of climax seral stages is less fertile than the soil of pioneer communities.
TrueFalse

39.Mangrove swamps are tropical marine shoreline ecosystems dominated by trees.
TrueFalse

40.Tiny photosynthetic organisms that float near the ocean surface are called zooplankton.
TrueFalse

41.The primary determiners of biomes are the amount and distribution of rainfall and the yearly temperature cycle.
TrueFalse

42.Organisms in each biome have adapted to the climatic conditions typical of that biome.
TrueFalse

43.Rocky shores along the ocean provide surfaces for organisms to attach themselves.
TrueFalse

44.Deep cold-water lakes with poor productivity are called oligotrophic systems.
TrueFalse

45.Regional terrestrial climax communities are called eutrophic systems.
TrueFalse

46.In the open ocean, light penetrates many miles to the ocean floor.
TrueFalse

47.Organisms that are attached to the bottom of an aquatic ecosystem are termed pelagic.
TrueFalse

48.The upper layer of an aquatic ecosystem where sunlight penetrates is termed the euphotic zone.
TrueFalse