Eutrophication of water bodies resulting to killing of fishes is mainly due to non-availability of ______________.
A. Food
B. Light
C. Oxygen
D. Essential minerals
Author: Aroma Ann
____________ is one of the most endangered species of Indian birds.
A. Bee eater
B. Paradise fly catcher
C. Owl
D. The great Indian bustard
Acid rain contains ______________.
A. Sulphuric acid
B. Hydrochloric acid
C. Oxalic acid
D. Acetic acid
The limitating factor in temperate and boreal forest is _____________.
A. Nutrients
B. Frost
C. Oxygen
D. Sunlight
Water from springs contain dissolved ______________ compounds which are used to cure some skin diseases.
A. Nitric
B. Carbon
C. Oxide
D. Sulphur
Soil erosion can be prevented by ____________.
A. Deforestation
B. Afforestation
C. Overgrazing
D. Removal of vegetation
The most important reason for decrease in biodiversity is ____________.
A. Habitat pollution
B. Introduction of exotic species
C. Over-exploitation
D. Habitat destruction
Decomposers are otherwise called as ______________.
A. Detritivores
B. Primary consumers
C. Organic matter
D. Secondary consumers
The pollution which does not persistent harm to life supporting system is ____________.
A. Noise pollution
B. Radiation pollution
C. Organochlorine pollution
D. All of these
The response of predator to prey and vice- versa, over ten of thousands of years, produces physical and behavioral changes in a process called _____________.
A. Co-evolution
B. Evolution
C. Origin
D. Development
