Environmental Science - Study Mode

[#601] The limitating factor in temperate and boreal forest is
Correct Answer

(D) Sunlight

Explanation

Solution: Due to the older age and species diversity of the temperate forest ecosystems, many grasses and lower lying shrubs have difficulty growing to the breadth of the canopy composed of the taller trees. As a result, little sunlight actually reaches the forest floor, which serves as its own limiting factor.

[#602] Eutrophication of water bodies resulting to killing of fishes is mainly due to non-availability of
Correct Answer

(C) Oxygen

Explanation

Solution: The concentration of the oxygen would fall and this causes the death of the aquatic animals due to the suffocation. Hence, the correct answer is 'non-availability of oxygen'.

[#603] The ozone at ground level is primarily from __________ precursors.
Correct Answer

(A) Fossil fuel

Explanation

Solution: The ozone at ground level is primarily from fossil fuel precursors.

[#604] Gas released during photosynthesis is
Correct Answer

(C) Oxygen

Explanation

Solution: Oxygen is released during the process of photosynthesis.

[#605] The earth's first atmosphere was composed primarily of:
Correct Answer

(B) Hydrogen and helium

Explanation

Solution: At its initial formation, the Earth's first atmosphere was composed primarily of the light elements hydrogen and helium.