Biosphere Test

8/16/2019 Biosphere Test

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Assignment #177 Biosphere Name:

Date:

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1)

An ocean food webIf the food web was contaminated with fat-soluble PCBs, which of the followingorganisms would have the highest PCB concentration?

(A) Right whale(B) Killer whale(C) Crustacea(D) Krill

2) Non-biodegradable pesticides accumulate in each consumer organism in a foodchain. The concentration increases at each trophic level.

The process in the given description is referred to as(A) bioremediation(B) biomagnification(C) bioconcentration(D) biotransformation

3) A population of aquatic insects feeds on algae growing in a small pond. Algae usesunlight to make food. Recently, nearby logging has caused excess soil to washinto the pond.How will the change in the abiotic parts of this ecosystem affect the biotic parts?

(A) Sunlight and soil will decrease.(B) The number of aquatic insects will increase.(C) Algae populations will decrease as sunlight increases.(D) The aquatic insect and algae populations will decrease.

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4) Which two factors are primarily responsible for the tropical rainforest biomes thatare found in much of South and Central America, central Africa, and southeastAsia?(A) Low temperature and low precipitation(B) Low temperature and high precipitation

(C) High temperature and low precipitation(D) High temperature and high precipitation

5) Similar biomes can be found between 20 and 30 degrees from the equator, to thenorth and to the south. Which of the following type of biome is found around theglobe at these locations?(A) Tundra(B) Desert(C) Boreal Forest(D) Tropical Rainforest

6) The bioaccumulation of pesticides was recognized as a major environmental issuewhen the effects of DDT on peregrine falcons was discovered. DDT negativelyimpacted the peregrine falcon population because(A) it was killing their prey, and they were starving to death(B) the amount of DDT in adult falcons was high enough to kill them(C) the amount of DDT in juvenile falcons was high enough to kill them(D) it was lowering their reproductive success by causing thinner eggshells

7) Time Required for Biodegradation

Pesticide

Time forcomplete

biodegradation

1 Four weeks

2 Three Days

3 One year

4 Six hours

Which of the pesticides shown in the table above is most likely to bioaccumulatein an organism?

(A) Pesticide 1(B) Pesticide 2(C) Pesticide 3(D) Pesticide 4

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8)

Terrestrial food webWhat is the highest trophic level the owl can occupy in the given food web?

(A) Second

(B) Fourth(C) Third(D) Fifth

9) Tammy made a list of what she considered to be four consequences of droughtconditions.

Consequence Characteristic

M Decrease in dust storms

N Increase in wild fires

O Increase in hot, humid weatherP Decrease in aquatic species

Which of the consequences in Tammy’s list correctly indicate the effects ofdrought conditions?

(A) M and P(B) N and O(C) N and P(D) M and O

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10) In the Arctic, organic pollutant levels are increasing at an alarming rate, presentingorganisms that live in this already susceptible biome with the added problem ofbioaccumulation.Organic pollutants are accumulating faster in the polar ice biome than in otherbiomes mainly as a result of

(A) an increase in global warming and resulting warmer temperatures(B) the cold temperatures and lack of sunlight(C) a reduction in ocean and wind currents(D) the seasonal temperature changes

11) Energy flows in an ecosystem through the food chain. Energy leaving a trophiclevel is always less than the energy entering it.Which of the following statements about flow of energy is false?(A) Part of the energy is lost as heat.(B) Part of the energy is used for growth purposes.

(C) Energy flow through the energy pyramid is multidirectional.(D) Some of the energy stored in tissues is available to the other trophic levels.

12)

If the grass in the food web pictured above was sprayed with pesticide, which ofthe following statements would be true?

(A) The pesticide concentration would be higher in the grasshopper than in theweasel.

(B) The pesticide concentration would be higher in the spider than in the mouse.(C) The pesticide concentration would be higher in the mouse than in the weasel.(D) The pesticide concentration would be higher in the owl than in the mouse.

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13) Both the Arctic tundra and the Sahara are considered to be deserts.The main distinguishing feature between a desert and a grassland biome is(A) temperature(B) precipitation levels(C) nutrient content of soil

(D) amount of solar radiation

14) A team of scientists observed a change in an area where a lumber company hadremoved a large number of trees.The scientists noticed that excessive deforestation had lead to(A) larger habitats(B) less biodiversity(C) decreased erosion(D) improved soil quality

15) Which of the following environmental conditions common in the grassland biomeprevent the growth of trees in these regions?(A) Porous soil and low rainfall(B) Loamy soil and high rainfall(C) Frequent landslides and floods(D) Snow-covered land and permafrost

16) The tundra biome is one of six distinct geographical regions in North America.The tundra biome is characterized by(A) high temperatures and more biodiversity

(B) low temperatures and less biodiversity(C) high temperatures and less biodiversity(D) low temperatures and more biodiversity

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17) The Grand Banks are famous fishing grounds off the coast of Newfoundland.The cold Labrador Current and the warm Gulf Stream converge on the GrandBanks.

The island of Newfoundland could be thought of as an open system because

(A) it is surrounded by an ocean(B) it exchanges matter and energy with its surroundings(C) moisture leaves the island through evaporation and returns through

precipitation(D) ocean currents bring energy to and remove energy from the island

18) Deforestation in an area will not lead to

(A) a decrease in humidity(B) a decrease in biodiversity(C) an increase in the rate of soil erosion(D) an increase in the level of the water table

19) A group of researchers conduct a study of the aquatic plant life in a lake and findthat algae and other aquatic plants contain low levels of PCBs. The health andnumber of lake plants seem unaffected by the PCB levels.With respect to the health of the animals in the lake, these study results are(A) not a cause for concern because PCBs are easily biodegraded by plant life

(B) not a cause for concern because PCBs do not bioaccumulate or biomagnify(C) a cause for concern because organisms in higher trophic levels in the lakemay have high concentrations of PCBs

(D) a cause for concern because organisms in lower trophic levels in the lakemay have high concentrations of PCBs

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20) The largest population in a typical food chain is comprised of(A) primary consumers(B) tertiary consumers(C) decomposers(D) producers
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