Define population and community.

Important Questions on Organisms and Populations

EASY

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 2

Distinguish ectoparasites and endoparasites.

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 3

What are the main functions of water vapours present in the atmosphere?

HARD

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 4

Why cannot a population live alone by itself in nature?

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 5

Clownfish lives among the tentacles of Sea Anemones. What is this interaction between them called and why they carry out this interaction?

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 6

Egrets are often seen along with grazing cattle. How do you refer to this interaction? Give a reason for the association.

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 7

What is “r” in the population equation dN /dt = rN?

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 7

How does increase and decrease in the value of “r” affect the population size?

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 8

Differentiate between mutualism and competition.