Organisms and Populations Test

Result

Organisms and Populations Test - 48

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

After exponential increase, population becomes stagnant . The growth curve is

A
J-shaped

B
S-shaped

C
Fluctuating

D
Circular

Solution

In a S shaped growth curve, first there is slow increase in population. Followed by this, there is rapid increase in growth. And after this, the growth becomes stagnant and population becomes stable.
Question 2
1 / -0

Competition is severe in a population that has distribution

A
Irregular

B
Uniform

C
Random

D
Nonrandom

Solution

In a population different species live together in different areas according to their habitat and fulfillment of their needs. As a result, there is competition among the individuals of these species. If the distribution of species is irregular, there would be greater struggle for existence. They will fight for fulfillment of their requirements and one species will get extinct, and the fittest one will survive.
SO, option A is the correct answer.
Question 3
1 / -0

Information about birth rate, death rate, sex ratio, age distribution, etc. of a population is obtained from

A
Mortality table

B
Life table

C
Natality table

D
Both A and C

Solution

A mortality table defines the death ratio of a population. It is also known as Life table.
A natality table includes the birth rate of a population.
Both the tables provides information about the sex ratio and the age distribution.
So, the correct answer is option D.
Question 4
1 / -0

The relation between algae and fungi in a lichen is

A
Symbiosis

B
Parasitism

C
Commensalism

D
Protocoperation
Solution
- When organisms belonging to two different species live together, and mutually benefit each other, the type of relationship is called a symbiotic relationship.
- In the case of lichen, algae and fungi live together in symbiosis.
- The algae provide food and fungi provide shelter.
So, option A is the correct answer.
Question 5
1 / -0

Number of immigration is more than emigration and death is lower than natality. Growth curve of population will show

A
Exponential phase

B
Lag phase

C
Declining phase

D
Steady phase

Solution

Exponential model is the one in which rate of change in anything is directly proportional to the number of the thing present. Exponential phase shows the exponential growth. Thus the size or the number increases at a constant growing rate.
So, option A is the correct answer.
Question 6
1 / -0

In commensalism,

A
Both partners are benefitted.

B
Both partners are harmed.

C
Weaker is benefitted while stronger is unharmed.

D
None of the above.

Solution

Commensalism is a type of environmental interaction in which two organisms live together. The one which is weaker is benefitted by this interaction, and the one which is weaker is neither harmed nor benefitted. For example, the remora fish riding on a shark.
So, option C is the correct answer.
Question 7
1 / -0

Competition for light, nutrients and space is most severe between

A
Closely related organisms growing in different niches.

B
Closely related organisms growing in the same area/niches.

C
Distantly related organisms growing in same habitat.

D
Distantly related organisms growing in different habitat.

Solution

When two closely associated species, that have the same feeding habits, and exhibit similarities, stay together, they compete with each other. They show competition for food, shelter and other daily requirements of life. When they live in the same habitat, their requirements clash, and competition between them increases. As a result, they struggle for their existence and the fittest among them can survive.
So, option B is the correct answer.
Question 8
1 / -0

Zoochlorellae in Hydra produces an association known as

A
Symbiosis

B
Parasitism

C
Predation

D
Commensalism

Solution

The type of population interaction seen between zoochlorellae and hydra is that of predation. Zoochlorellae takes up the carbon die oxide and nitrogen and phosphorous waste of hydra, and in turn, provide them with nutrients and oxygen. Hydra then feeds on zoochlorellae. So, it can be said that hydra feeds upon zoochlorellae. And the relation between them is predation.
Question 9
1 / -0

Which of the following is wrong ?

A
Lichen, an association of fungus and alga, is an example of mutualism.

B
Epiphytes, using other plants for support only and not for water or food, show commensalism.

C
Sea Anemone and Hermit Crab association is an example of protocooperation.

D
Mutualism, protoco-operation and commensalism cannot be included under symbiosis.
Solution
Correct Option: D

Explanation :
Mutualism, protoco-operation, and commensalism are the types of symbiosis.
Symbiosis refers to the equally beneficial relationship between two different individuals.
Mutualism is an interaction between two organisms of different species where both the partners are benefited with none of the two capable of living separately.
Protoco-operation is an association between organisms of different species in which both are mutually benefited but they can live without each other.
Commensalism is an association between two different organisms or species in which one is always benefited by the other is neither benefited nor harmed.

Hence, the statement "Mutualism, protoco-operation and commensalism cannot be included under symbiosis", is wrong.
Question 10
1 / -0

Which of these take part in symbiosis of lichen?

A
Alga-Fungus

B
Alga-Alga

C
Fungus-Fungus

D
Fungus-Gymnosperm

Solution

Lichen has a stable symbiotic association between a fungus and an algae and/or cyanobacteria. Lichens require carbon as a food source, it is provided by their symbiotic photosynthetic algae. These algae are called photobionts that can produce simple sugars by photosynthesis.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Organisms and Populations Test - 48

Result

Organisms and Populations Test - 48

Score

-

Rank

-

SHARING IS CARING

Question 1

J-shaped

S-shaped

Fluctuating

Circular

Solution

Question 2

Irregular

Uniform

Random

Nonrandom

Solution

Question 3

Mortality table

Life table

Natality table

Both A and C

Solution

Question 4

Symbiosis

Parasitism

Commensalism

Protocoperation

Solution

Question 5

Exponential phase

Lag phase

Declining phase

Steady phase

Solution

Question 6

Both partners are benefitted.

Both partners are harmed.

Weaker is benefitted while stronger is unharmed.

None of the above.

Solution

Question 7

Closely related organisms growing in different niches.

Closely related organisms growing in the same area/niches.

Distantly related organisms growing in same habitat.

Distantly related organisms growing in different habitat.

Solution

Question 8

Symbiosis

Parasitism

Predation

Commensalism

Solution

Question 9

Lichen, an association of fungus and alga, is an example of mutualism.

Epiphytes, using other plants for support only and not for water or food, show commensalism.

Sea Anemone and Hermit Crab association is an example of protocooperation.

Mutualism, protoco-operation and commensalism cannot be included under symbiosis.

Solution

Question 10

Alga-Fungus

Alga-Alga

Fungus-Fungus

Fungus-Gymnosperm

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.