MDCAT Biology Chapter 8 MCQ Test With Answer for (Evolution)

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MCQ's Test For MDCAT Biology Chapter 8 MCQ's Test

Try The MCQ's Test For MDCAT Biology Chapter 8 MCQ's Test

  • Total Questions20

  • Time Allowed20

MDCAT Biology Chapter 8 MCQ's Test

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Question # 1

When bacteria break down nitrates and release nitrogen  back into atmosphere this process is called:

Question # 2

The second trophic level includes the:

Question # 3

Lichens are dual organisms composed of symbiotic association of algae living within a fungus:

Question # 4

All the organisms, primarily animals, which obtain energy directly or indirectly from the produces as ready-organic food are:

Question # 5

Biotic components includes all the

Question # 6

Nutrient cycle are also called us:

Question # 7

Global warming is the result of

Question # 8

Herbaceous stage in xerosere is the __________:

Question # 9

A change in the community structure of an ecosystem over a period of time is:

Question # 10

In an ecosystem after succession, a new invaders are called

Question # 11

One atom of chlorine can destroy up to ___________ ozone molecules?

Question # 12

About 20 years ago what was the rate at which human population was increasing

Question # 13

A thin layer of earth in which all living organisms live is called:

Question # 14

The legume plants, Pea and been are the hosts to symbiont bacteria which inhabit the roots forming root:

Question # 15

The relationships between insects and flowering plants is an example of:

Question # 16

The symbiotic relationship in which both the partners get benefit is:

Question # 17

Which of the following is not an abiotic component

Question # 18

When bacteria in soil oxidize ammonia or ammonium ions this is called:

Question # 19

Which of the following is not the true about predation

Question # 20

Dominant species of mammals in grassland are the:

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MCAT Biology Chapter 8 Important MCQ's

Sr.# Question Answer
1 Grazers feed mainly on which kind of plants
A. Tree leaves
B. Shrubs
C. Grasses
D. Cereals
2 Mycorrhiza is an association of
A. Algae with roots of higher plants
B. Bryophytes with roots of higher plants
C. Fungi with roots of higher plants
D. Bacteria with roots of higher plants
3 The lake ecosystem can be divided into ______ number of zones:
A. Two
B. Three
C. Four
D. Five
4 Which of these stages appears as a pioneer during succession on barren land?
A. Foliage lichens
B. Mosses
C. Crustose lichens
D. Fruiticose lichens
5 Predator-prey relationship has a significant influence on:
A. Distribution of organisms
B. Abundance of organisms
C. Both a & b
D. Non-availability of organisms
6 The amount of energy left after plants have met their respiratory needs is net primary production, which shows up as plant:
A. Respiration
B. Photosynthesis
C. Biomass
D. Reserve
7 Overgrazing resulted in
A. Diminishing the grasses
B. Desert
C. Barren land
D. All of these
8 Some ______ years ago human population and conversion of land to agricultural production began
A. 10,000
B. 40,000
C. 5000
D. None
9 Major regional ecological community of plants and animals forms:
A. Triomes
B. Biosphere
C. Biomes
D. Biogeography
10 In 1917, Joseph Grinnell an American ornithologist first proposed the term niche in:
A. Taxonomy
B. Neurology
C. Ecology
D. Embryology

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