NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology: Questions 3420 - 3424 of 3511

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Question number: 3420

» Ecology and Environment » Environmental Issues » Water Pollution and Its Control

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Appeared in Year: 2009

MCQ▾

Question

Biochemical Oxygen Demand (BOD) in river water: - (CBSE)

Choices

Choice (4) Response

a.

Increases when sewage gets mixed with river water

b.

Gives a measure of salmonella in the water

c.

Remains unchanged when algal bloom occurs

d.

Has no relationship with concentration of oxygen in the water

Question number: 3421

» Ecology and Environment » Organisms and Environment » Population Interactions-Mutualism, Competition, Predation, Parasitism

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Appeared in Year: 2010

MCQ▾

Question

Which one of the following is most appropriately defined? (CBSE)

Choices

Choice (4) Response

a.

Predator is an organism that catches and kills other organism for food.

b.

Amensalism is a relationship in which one species is benefited whereas the other is unaffected.

c.

Host is an organism which provides food to another organism.

d.

Parasite is an organism which always lives inside the body of other organism and may kill it.

Question number: 3422

» Ecology and Environment » Biodiversity and Its Conservation » Biodiversity Conservation

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Appeared in Year: 2010

MCQ▾

Question

Which one of the following is an example of ex-situ conservation? (CBSE)

Choices

Choice (4) Response

a.

Wildlife sanctuary

b.

Sacred groves

c.

Seed bank

d.

National park

Question number: 3423

» Ecology and Environment » Organisms and Environment » Population and Ecological Adaptations

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Appeared in Year: 2010

MCQ▾

Question

Which one of the following is a xerophytic plant in which the stem is modified into a flat, green and succulent structure? (CBSE)

Choices

Choice (4) Response

a.

Opuntia

b.

Acacia

c.

Casuarina

d.

Hydrilla

Question number: 3424

» Ecology and Environment » Environmental Issues » Greenhouse Effect and Global Warning

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Appeared in Year: 2008

MCQ▾

Question

Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming? (CBSE)

Choices

Choice (4) Response

a.

N2O 6%, CO2 86%

b.

CO2 40%, CFCs 30%

c.

CFCs 14%, Methane 20 %

d.

Methane 20%, N2O 18 %