What is the most common blood type in the U.S. population?

A) type O-
B) type B+
C) type AB-
D) type O+


D

Biology & Microbiology

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Excreting ammonia directly into the environment (select all correct choices):

A. is energetically inexpensive. B. requires high volumes of water. C. is energetically expensive. D. requires little water. E. converts it into a less toxic form.

Biology & Microbiology

Most strains of Escherichia coli can be presumptively identified on the basis of which characte-ristic?

a. Spot indole–positive b. Citrate-positive c. Methyl red–negative d. Urease-positive

Biology & Microbiology

Which of the following elements cannot be utilized directly from the atmosphere by plants?

a. carbon b. nitrogen c. oxygen d. phosphorus

Biology & Microbiology

Larrea tridenta is chemically defended against most herbivores and some are able to survive

thousands of years.

Indicate whether the statement is true or false.

Biology & Microbiology