A keystone species is an organism that ________.
A. lives in coastal regions
B. is very abundant
C. plays a crucial role in an ecosystem
D. is endangered
Answer: C
Environmental & Atmospheric Sciences
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Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
Of the following, ________ are classified as hazardous heavy metals
A) lead, mercury, cadmium B) carbon, hydrogen, oxygen C) nitrogen, phosphorus, potassium D) aluminum, iron, silicon E) any non-biodegradable materials
Environmental & Atmospheric Sciences
An area distinguished by one or more unique characteristics is a(n)
A) biome. B) landscape. C) region. D) uniform unit. E) ecosystem.
Environmental & Atmospheric Sciences
Cyclones in the Northern Hemisphere are ________ air flows
A) clockwise B) counterclockwise C) north-flowing D) south-flowing E) mythical
Environmental & Atmospheric Sciences