Biology - Mock Test 7

Question 61

In an ecosystem, which one of the following types of entities occupies more than one trophic level

A) Frog B) Phytoplankton C) Zooplankton D) Fish

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Question 62

The rate at which food energy is assimilated at the trophic level of consumers is known as

A) Gross primary productivity B) Net primary productivity C) Secondary productivity D) None of the above

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Question 63

This entity will be the first one to colonize a bare rock

A) Herbs and shrubs B) Annual plants C) Lichens D) Perennial plants

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Question 64

This ecosystem has the maximum biomass

A) Grassland ecosystem B) Pond ecosystem C) Lake ecosystem D) Forest ecosystem

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Question 65

These are the primary producers of the deep-sea hydrothermal vent ecosystem

A) blue-green algae B) coral reefs C) chemosynthetic bacteria D) green algae

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Question 66

This is a characteristic feature of cropland ecosystem

A) Absence of weeds B) Ecological succession C) least genetic diversity D) absence of soil entities

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Question 67

At the producer level, if 20 J of energy is trapped then how much energy will be available to a peacock as food in the subsequent chain <br> Plant -> Mice -> Snake -> Peacock

A) 0.2 J B) 0.02 J C) 0.002 J D) 0.0002 J

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Question 68

A few normal seedlings of tomato were placed in a dark room. After a few days, they were found to have turned White-coloured like albinos. Which of these can be used to describe them

A) Defoliated B) Etiolated C) Embolized D) Mutated

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Question 69

Gibberellins can facilitate seed germination due to their influence on

A) synthesis of abscisic acid B) rate of cell division C) production of hydrolyzing enzymes D) absorption of water through hard seed coat

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Question 70

An enzyme which can stimulate the germination of barley seeds is

A) Invertase B) Lipase C) Protease D) α-amylase

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