Environmental Science - Study Mode
[#496] During the course of a year, the sun will disappear from view near the North Pole on what date?
Correct Answer
(B) September 23
Explanation
Solution: At the Autumn Equinox, approximately September 23, the sun sinks below the horizon, and the North Pole is in twilight until early October, after which it is in full darkness for the Winter.
[#497] _______ trees shed their leaves during winter and hot summer.
Correct Answer
(C) deciduous
Explanation
Solution: Tropical deciduous trees shed their leaves in summers because the climate becomes hot and the leaves automatically become dry and shed off. Moreover they need to conserve water so that they can sustain in winters thus they shed their leaves.
[#498] Average total rainfall is 100 - 150 cm in __________ , located in Australia, South America and Africa.
Correct Answer
(B) chaparrals
Explanation
Solution: Average total rainfall is 100 - 150 cm in chaparrals, located in Australia, South America and Africa.
[#499] Which one is nature's cleaner?
Correct Answer
(C) Decomposers and Scavengers
Explanation
Solution: Decomposers and scavengers are those which decomposes the waster organic matter and release energy back in the environment. Hence, they are also called as nature's cleaner. They are present in the apex of the pyramid. Thus, the correct answer is 'Decomposers and scavengers.
[#500] The pyramid of number of a parasitic food chain in forest ecosystem is
Correct Answer
(A) always inverted
Explanation
Solution: The pyramid of number of a parasitic food chain in forest ecosystem is always inverted.