Organisms and Populations Test

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Organisms and Populations Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

The number of forest types found in India are

A
16

B
10

C
12

D
24

Solution

Types of forests in India vary depending upon environment, climate, soil quality, topography and altitude. These factors are responsible for natural diversity in forests. In India there are 16 types of forests. A few of them are: Indian tidal or mangrove, temperate deciduous, Himalayan subtropical, western Himalayas broad leaved, rain forest, eastern highland moist deciduous, Indian deciduous, western Himalayan subalpine, tropical rain forest, east Deccan dry evergreen, Indian dry deciduous, Maldives Lakshadweep forests, and so on.
Question 2
1 / -0

The faster a 'waggle dance' is completed in bees, the

A
Farther away is the food

B
Closer is the food

C
Greater is the amount of food available

D
Higher the food off the ground

Solution

Waggle dance is a term used in beekeeping and ethology for a particular figure-eight dance of the honey bee. By performing this dance, successful foragers can share, with other members of the colony, information about the direction and distance to patches of flowers yielding nectar and pollen, to water sources, or to new nest-site locations.
A waggle dance with a very short waggle run used to be characterized as a distinct (round) recruitment dance. Austrian ethologist and nobel laureate Karl von Frisch was one of the first, who translated the meaning of the waggle dance.
The waggle dance - the direction the bee moves in relation to the hive indicates direction; if it moves vertically upwards the direction to the source is directly towards the Sun, the duration of the waggle part of the dance signifies the distance. Faster the waggle dance, closer is the food available.
Question 3
1 / -0

If there was no CO$$_2$$ in the earth's atmosphere, the temperature of earth's surface would be

A
As such

B
Less than the present level

C
Increase from present level

D
Dependent upon oxygen amount of the environment

Solution

Carbon dioxide is a greenhouse gas. It has the ability to trap sunlight and thus causes the increase in the temperature of Earth surface. If the situation on the Earth was with a lesser amount of $$CO_2$$, the temperature would have been very little. More pollution will cause the release of more $$CO_2$$ to the atmosphere causing global warming.
Question 4
1 / -0

Decline in forests is

A
Plagiosere

B
Waldsterben effect

C
Jhum

D
Cattle ranching

Solution

Forest die back is the other name for Waldsterben effect. It is a condition in trees or woody plants in which peripheral parts are killed, wither by parasites or due to conditions like acid rain and drought. Two of the nine tipping points for major climate changes, forecast for the next century are directly related to forest die backs. Phomopsis azadirachtae is a fungus of the Phomopsis genus that has been identified as the fungus responsible for die back of Azadirachta indica.
Question 5
1 / -0

The energy which is utilized by the living world is primarily

A
Heat energy

B
Electrical energy

C
Light energy

D
Kinetic energy
Solution
- Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis.
- Animals eat plants and use that same chemical energy for all their activities.
- Thus, the correct answer is option C.
Question 6
1 / -0

The lowest temperature of any land mass of the universe was recorded in

A
North America (1949)

B
Mt. Everest, Himalayas (1954)

C
Antarctica (1982)

D
Siberia (1947)

Solution

The Siberian city of Yakutsk is the coldest in the world. It was -89.8$$^0$$C temperature in 1947. Coldest Temperature in North America was -62.8$$^0$$C in 1949. The temperature of Mt. Everest, Himalayas in 1954 was -36$$^0$$C. Antarctica's lowest temperature was recorded in 1982 and was -89.2$$^0$$C.
Thus, the correct answer is option D.
Question 7
1 / -0

Large gap between natality and mortality will result in

A
Less old persons in relation to children

B
More old people in population

C
Low dependency ratio

D
Prosperous country

Solution

The Large gap between natality and mortality will result in more old people in the population. As natality is the ratio of the number of births to the size of the population and mortality is the state of being subject to death.
Large gap between natality and mortality shows an increased life span. It ensures the longevity and survival of old people. This results in the increase of old people in the population. It also makes the population size to increase.
Question 8
1 / -0

Exponential growth in a given population of a microorganism is limited by

A
Competition for food

B
Accumulation of waste matter

C
Both of (A) and (B)

D
None of the above

Solution

The exponential phase is characterised by the vigorous growth of the bacteria where it is in the constant state of division. They undergo the DNA replication and synthesis of new proteins which increases their metabolic rate.
As the bacterial population continues to grow, all the nutrients in the growth medium are used up by the microorganism for their multiplication. This results in the accumulation of waste materials, toxic metabolites and inhibitory compounds such as antibiotics in the medium. The reproduction rate will slow down, the cells undergoing division is equal to the number of cell death, and finally, bacteria stops its division completely. Thus, the correct answer is option C.
Question 9
1 / -0

Blastophaga grossorum shows mutualistic relationship with

A
Hypanthodium inflorescence

B
Ficus

C
Phaseolus

D
Both (A) and (B)

Solution

Mutualistic relationship do exist between the Blastophaga plant and the fig trees. Female wasps lay eggs only in hypanthodium inflorescence, which is present in fig trees. Thus, the correct answer is option D.
Question 10
1 / -0

Parasitoidism is a case where the larval form

A
Lives after host's death

B
Dies with host's death

C
Is parasite but adult is free living

D
Is a parasite on another parasite

Solution

Parasitoidism : A relation existing between various insect larvae and their hosts in which the larva feeds upon the living host tissues in an orderly sequence such that the host is not killed until the larval development is complete. Ladybird beetle, Coccinela is a parasite in its larval stage and is free living in adults; other include parasitic hymenopteran and orthopterans.
Thus, the correct answer is option C.

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Re-Attempt Weekly Quiz Competition

Organisms and Populations Test - 29

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Organisms and Populations Test - 29

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SHARING IS CARING

Question 1

16

10

12

24

Solution

Question 2

Farther away is the food

Closer is the food

Greater is the amount of food available

Higher the food off the ground

Solution

Question 3

As such

Less than the present level

Increase from present level

Dependent upon oxygen amount of the environment

Solution

Question 4

Plagiosere

Waldsterben effect

Jhum

Cattle ranching

Solution

Question 5

Heat energy

Electrical energy

Light energy

Kinetic energy

Solution

Question 6

North America (1949)

Mt. Everest, Himalayas (1954)

Antarctica (1982)

Siberia (1947)

Solution

Question 7

Less old persons in relation to children

More old people in population

Low dependency ratio

Prosperous country

Solution

Question 8

Competition for food

Accumulation of waste matter

Both of (A) and (B)

None of the above

Solution

Question 9

Hypanthodium inflorescence

Ficus

Phaseolus

Both (A) and (B)

Solution

Question 10

Lives after host's death

Dies with host's death

Is parasite but adult is free living

Is a parasite on another parasite

Solution

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