Respected members, 12th Class Biology MCQS Available Here. In this pages your can get 12th Class Biology MCQS with Answers. You can read and practice, 12th Class Biology MCCQS on Different Topic, We make Online question bank with the help of experienced teachers and subject specialists.
FG Study / Quiz is also very useful website for online Quiz and Test sessions. Where FG STUDY Team Design and Develop large Database and Content Management System for the quizzes. We provide wide scale online quiz System for various educational and professional examination. If you are interested please visit our site FG Study Quiz
Remember That The FG STUDY Team Always provide unique and useful content for students. If you have any question or problem do not hesitate to contact us, we will be happy to reply, Thanks
A change in the community structure of an ecosystem over a period of time is:
Ecological niche
Ecological mutation
Genetic Drift
Succession
In oceans especially in tropical regions temperature of surface water is about
10oC
25oC
15oC
35oC
Modern man is called
Homo sapiens
Homo habilis
Homo erectus
Homo neanderthalensis
A form of air pollution in which airbone acids produced by electric utility plants and other sources fall to Earth in distant regions is
Drizzling
Heavy rain
Basic rain
Acid rain
The decline in thickness of the ozone layer is caused by increasing level of
Chlorine
Chlorofluorocarbon
Carbon dioxide
Nitrogen
What would be expected to happen if all the nitrogen-fixing organisms ceased to exist?
All organisms would die out
There would be no significant change in number of animals
The nitrogen level of the atmosphere would be increase
The total number of biomass would be reduced
The fossil fuels are
Coal
Oil
Gas
All a,b and c
Only 30% of the earth is dry land the remainder being covered with
Trees
Grass
Water
Air
The best way to increase food production from ecosystem view point is:
Use of genetically improved varieties of seeds
Use of excessive fertilizers
Use of high quality pesticides
To increase cultivable land by clearing forest
The study of hman populations and things that affect them is called:
Angiography
Mammography
Demography
Homography
Rain that falls on high areas such as mountains possesses large amount of garvitational
Kinetic energy
Heat energy
Electrical energy
Potential energy
Which statement defines the net primary production in an ecosystem over a given time period?
The total amount of organic matter in all organisms present
The total amount of organic matter in the plants in excess of that used in respiration
The total amount of photosynthesis product from all plants
The total amount of organic matter used in respiration by all the organisms present
A pesticide is a chemical which destroys agricultural
Pests
Both a & b
Crops
Competitors
The total energy from the sun is happened by the producers in an ecosystem is about?
We and our third party partners use cookies on our site to offer you a better browsing experience. AcceptReject
Privacy & Cookies Policy
Privacy Overview
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.