The human population is 

A. at its carrying capacity.
B. growing rapidly.
C. declining on a worldwide basis.
D. approximately 5 million people.


B. growing rapidly.

Biology & Microbiology

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A trait that is expressed as a continuum rather than as a few discrete phenotypes is

A. polygenic. B. sex-linked. C. codominant. D. Mendelian. E. either polygenic or codominant.

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Anti-Rh antibodies may not cross the placenta

Indicate whether this statement is true or false.

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During normal quiet exhalation, ____

a. thoracic volume increases b. the diaphragm contracts c. alveolar pressure is greater than atmospheric pressure d. the ribs are moved upward e. atmospheric pressure rises

Biology & Microbiology

A commensal bacterium

A) does not receive any benefit from its host. B) is beneficial to its host. C) may also be an opportunistic pathogen. D) isn't capable of causing disease in its host. E) always causes disease in its host.

Biology & Microbiology