Heavy dust can cause __________?
A. leaf blights
B. opening of stomata
C. closure of stomata
D. browning of leaves
Author: Aroma Ann
During the afternoon the greatest temperature difference between the surface air and the air several meters above occurs on a __________?
A. Clear, calm afternoon
B. Clear, windy afternoon
C. Cloudy, calm afternoon
D. Cloudy, windy afternoon
The first trophic level in a food chain is __________?
A. Green Plants
B. Herbivores
C. Carnivores
D. Bacteria
Continue reading “The first trophic level in a food chain is __________?”
The effect of ozone depletion include __________?
A. UV light reaches the earth
B. affect the climate
C. cause skin cancer
D. all the above
Continue reading “The effect of ozone depletion include __________?”
Acid rain mainly result from __________?
A. Sulfur dioxide
B. Carbon dioxide
C. Carbon monoxide
D. Ammonia
Animals that feed only on plants are called __________?
A. detritivores
B. herbivores
C. carnivores
D. omnivores
Continue reading “Animals that feed only on plants are called __________?”
The inherent ability of organisms to reproduce and multiply is called __________?
A. C value
B. biotic potential
C. carrying capacity
D. K value
The true statement about “green house effect” is that it is __________?
A. caused by combination of many gases
B. caused by CO2
C. caused only by CO2, CFC, CH4 and NO2 gases
D. None of these
Which of the following green house gases trap more heat?
A. Methane
B. Nitrous oxide
C. Carbon dioxide
D. Trifluoro methyl sulphurpentafluoride
