Define Commensalism and Parasitism.

Important Questions on Organisms and Populations

HARD

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 13 - Organisms and Populations>Bihar Board-2020>Q 10

What do you understand by population ? On which factors does the population of organism depend at any place ? Write in brief.

HARD

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 13 - Organisms and Populations>Bihar Board-2020>Q 11

What is adaptation ? Which type of adaptation is found in plants of deserts ?

HARD

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 13 - Organisms and Populations>Bihar Board-2020>Q 12

What is Age pyramids ?

EASY

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 13 - Organisms and Populations>Bihar Board-2020>Q 13

Define Immigration and emigration.

EASY

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 13 - Organisms and Populations>Bihar Board-2020>Q 14

Morgan used Drosophila as experimental material because-

HARD

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 13 - Organisms and Populations>Bihar Board-2020>Q 15

What are the main reasons of population explosion ?