Nitrogen and ________ are usually responsible for cultural eutrophication
Fill in the blank(s) with correct word
phosphorus
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It is not surprising to find huge masses of plastic waste in the oceans because ____.
A. more plastic is dumped in the ocean than on land B. most plastic sinks in water C. plastics break down quickly D. illegal dumping is rare worldwide E. they are only carried into the ocean in runoff
The permeability of an igneous rock can be increased by
A) sorting. B) cementation. C) fracturing. D) metamorphism.
On Mohs' hardness scale, ordinary window glass has a hardness of about
A. 7-8 B. 5-6 C. 2-3 D. 3-4
Judge the following sentence according to the criteria given below: All marine algae must live near the ocean surface BECAUSE this is where food can be obtained
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.