Which country is the leading source of immigrants to the United States?

A) China
B) Mexico
C) Spain
D) Cuba
E) Colombia


Answer: B) Mexico

Environmental & Atmospheric Sciences

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An amino acid is an organic molecule that contains both an amine group and a carboxyl group. At an acidic pH, which structure is most likely?

A. Structure (a) B. Structure (b) C. Structure (c) D. All three structures are equally possible.

Environmental & Atmospheric Sciences

Protein synthesis proceeds in which direction?

A) from the C-terminus to the N-terminus B) from the middle towards the two ends C) from the N-terminus to the C-terminus D) the direction varies from one protein to another

Environmental & Atmospheric Sciences

What is the greatest source of oxygen in deep water?

a. The respiration from bacteria b. The lack of large quantities of organisms c. Chemosynthesis d. Polar waters that have sunk from the surface

Environmental & Atmospheric Sciences

The process by which plants give up moisture to the air is:

a. evaporation. b. transpiration. c. evapotranspiration. d. none of these

Environmental & Atmospheric Sciences