Environmental Science - Study Mode

[#506] The effect of interspecific competition on niches is to make them
Correct Answer

(B) smaller

Explanation

Solution: The effect of interspecific competition on niches is to make them smaller.

[#507] The carrying capacity of a population is determined by its
Correct Answer

(D) limiting resources

Explanation

Solution: The carrying capacity of a population is determined by its limiting resources.

[#508] The order of succession in a lithosere or xerosere is
Correct Answer

(B) Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)

Explanation

Solution: Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community).

[#509] A river with high BOD value is
Correct Answer

(A) highly polluted

Explanation

Solution: The river which has high level of BOD is indicative of high pollution in the river as the dissolved oxygen available in the water is being used by the bacterias, and this result in less oxygen available to fish and other aquatic beings. Nitrates and phosphates contribute to high level of BOD.

[#510] The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is:
Correct Answer

Frost

Explanation

Solution: The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is frozen dew.