Organisms and Populations Test

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Organisms and Populations Test - 57

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Weekly Quiz Competition

Question 1
1 / -0

Consider the following table.
Table of statistics.
Oven the biomass yields of three different components of four tree species ($$5$$-year old). (tonnes per hectare) Tree Name Stem Branch Leaf Total(tonne/hectare).
a. Eucalyptus $$25$$ $$15$$ $$10$$ $$50$$
b. Leucaena $$2$$ $$13$$ $$5$$ $$40$$
c. Acacia $$20$$ $$7.5$$ $$2.5$$ $$30$$
d. Casuarina $$15$$ $$3.5$$ $$1.5$$ $$20$$
Which one of these trees has produced the highest percentage of stem biomass?

A
Casuarina

B
Acacia

C
Leucaena

D
Eucalyptus
Question 2
1 / -0

Consider the following statements.
Biological control through antagonism involves.
a. Amensalism
b. Competition
c. Parasitism
d. Predation
Which of the statements given are correct?

A
$$1$$ and $$2$$ only

B
$$2, 3$$ and $$4$$ only

C
$$1, 3$$ and $$4$$ only

D
$$1, 2, 3$$ and $$4$$
Question 3
1 / -0

Which one of the following statements correctly defines the term biomass in forestry?

A
The dry weight of the crop when it has attained the maximum growth

B
The dry weight of the crop when it has attained the maximum height

C
The dry weight of the crop when the spread of its canopy is maximum

D
The dry weight of the standing crop at any moment of time
Question 4
1 / -0

Match List-I with List-II and select the correct answer.
List-I List-II
a. Total root parasite $$1$$. Santalum
b. Total saprophyte $$2$$. Cuscuta
c. Total stem parasite $$3$$. Monotropa
d. Partial root parasite $$4$$. Rafflesia

A
A-$$4$$, B-$$2$$, C-$$3$$, D-$$1$$

B
A-$$4$$, B-$$3$$, C-$$2$$, D-$$1$$

C
A-$$2$$, B-$$3$$, C-$$1$$, D-$$4$$

D
A-$$2$$, B-$$4$$, C-$$3$$, D-$$1$$
Question 5
1 / -0

For which of the following cases, population density can be easily determined by utilizing non-biological parameter?

A
Fish density

B
Density of bacteria in culture plate

C
Siberian cranes at Bharatpur wetlands

D
Tiger census
Solution
Non biological parameters of water can be easily used to determine the population density of the fishes.
Bacteria, Siberian cranes and Tigers are impacted heavily by biological parameters and their population cannot be just estimated on the basis of non biological parameters.
These parameters include :
Presence of heavy metals
pH of water
Mineral content like nitrates and phosphorus
Temperature
Dissolved oxygen
Turbidity
So the correct answer is 'Fish'.
Question 6
1 / -0

Which one of the following options is true with respect to Emigration?

A
It is the difference between the births and deaths in a population.

B
It is the difference between individuals who have come to a habitat and who have left the habitat.

C
It involves individuals of different species coming to a habitat from elsewhere during the period under consideration.

D
It involves individuals of a population leaving a habitat during the time period under consideration.

Solution

Migration is the phenomenon of movement of individuals from one place to another permanently. Population growth is the difference between the births and deaths in a population. Immigration involves individuals of the species that have come into the habitat from elsewhere during the period under consideration. Emigration involves individuals of a population leaving a habitat during the time period under consideration.
Thus, the correct answer is option D.
Question 7
1 / -0

Consider the following statements:
1. Warm-blooded animals can remain active in a cold environment in which cold-blooded animals can hardly move.
2. Cold-blooded animals require much less energy to survive than warm-blooded animals.
Which of the statement(s) given above is correct?

A
Only 1

B
Only 2

C
1 and 2

D
Neither 1 nor 2
Question 8
1 / -0

Which type of organism, live in the body of termites, and digest wood cellulose converting it to soluble carbohydrates?

A
Algae

B
Fungi

C
Protozoa

D
Nemtoda

Solution

Termites eat wood, which is mostly cellulose, which they cannot digest without their symbiote gut protozoans. These protozoans cannot digest cellulose either, so their own symbiote bacteria digest it for them, and for the termites.
So, the correct option is 'Protozoa'.
Question 9
1 / -0

In a population interaction between the species X and the species Y, which one of the following statements is correct?

A
When X benefits and Y is disadvantaged, it is Competition

B
When both X and Y benefit, it is Mutualism

C
When both X and Y are disadvantaged, it is Predation

D
When both X and Y are disadvantaged, it is Parasitism

Solution

Competition is a relationship between two species in which both the species compete for the same resource or territory. The fitted out of two is benefited. Mutualism is a relationship between two species in which both species are benefited from the interaction. Parasitism is a relationship between two species in which one species (the parasite) is benefited and the other species (the host) is harmed. Predation is a relationship between two species in which one species (the predator) kills the other species (the prey) to obtain food.
Thus, the correct answer is option B.
Question 10
1 / -0

Which of the following statements is not true about parasitism ?

A
The host is generally larger than the parasite.

B
An efficient parasite usually kills its host.

C
Smaller parasites often live as endoparasites within the body of the host

D
Ectoparasites are attached to the outside of the host's body by specialized organs

Solution

A parasite never kills its hosts as it need food which it can take only from the host and if the host die , the parasite also cannot survive.
So, the correct option is 'An efficient parasite usually kills its host'

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Re-Attempt Weekly Quiz Competition

List-I	List-II
a. Total root parasite	$$1$$. Santalum
b. Total saprophyte	$$2$$. Cuscuta
c. Total stem parasite	$$3$$. Monotropa
d. Partial root parasite	$$4$$. Rafflesia

Organisms and Populations Test - 57

Result

Organisms and Populations Test - 57

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SHARING IS CARING

Question 1

Casuarina

Acacia

Leucaena

Eucalyptus

Question 2

$$1$$ and $$2$$ only

$$2, 3$$ and $$4$$ only

$$1, 3$$ and $$4$$ only

$$1, 2, 3$$ and $$4$$

Question 3

The dry weight of the crop when it has attained the maximum growth

The dry weight of the crop when it has attained the maximum height

The dry weight of the crop when the spread of its canopy is maximum

The dry weight of the standing crop at any moment of time

Question 4

A-$$4$$, B-$$2$$, C-$$3$$, D-$$1$$

A-$$4$$, B-$$3$$, C-$$2$$, D-$$1$$

A-$$2$$, B-$$3$$, C-$$1$$, D-$$4$$

A-$$2$$, B-$$4$$, C-$$3$$, D-$$1$$

Question 5

Fish density

Density of bacteria in culture plate

Siberian cranes at Bharatpur wetlands

Tiger census

Solution

Question 6

It is the difference between the births and deaths in a population.

It is the difference between individuals who have come to a habitat and who have left the habitat.

It involves individuals of different species coming to a habitat from elsewhere during the period under consideration.

It involves individuals of a population leaving a habitat during the time period under consideration.

Solution

Question 7

Only 1

Only 2

1 and 2

Neither 1 nor 2

Question 8

Algae

Fungi

Protozoa

Nemtoda

Solution

Question 9

When X benefits and Y is disadvantaged, it is Competition

When both X and Y benefit, it is Mutualism

When both X and Y are disadvantaged, it is Predation

When both X and Y are disadvantaged, it is Parasitism

Solution

Question 10

The host is generally larger than the parasite.

An efficient parasite usually kills its host.

Smaller parasites often live as endoparasites within the body of the host

Ectoparasites are attached to the outside of the host's body by specialized organs

Solution

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