HARD
12th CBSE
IMPORTANT
Earn 100

Comment on the following figures 1,2 and 3

A, B, C, D, G, P, Q, R, S are species.

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Important Questions on Organisms and Populations

MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 2

An individual and population have certain characteristics. Name these attributes with definitions.

HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 3

The following diagrams are the age pyramids of different populations. Comment on the status of these populations.

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HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 4

Comment on the growth curve given below.

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MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 5
A population of Paramoecium caudatum was grown in a culture medium. After 5 days the culture medium became overcrowded with Paramoecium and had depleted nutrients. What will happen to the population and what type of growth curve will the population attain? Draw the growth curve.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 6
Discuss the various types of positive interactions between species.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 7
In an aquarium, two herbivorous species of fish are living together and feeding on phytoplankton. As per the Gause's Principle, one of the species is to be eliminated in due course of time, but both are surviving well in the aquarium. Give possible reasons.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 8
While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 13 - Organisms and Populations>LONG ANSWER QUESTIONS>Q 9
Do you agree that regional and local variations exist within each biome? Substantiate your answer with suitable example.