When plowing or grazing removes plants and exposes topsoil to wind erosion, the result is often:
a. desertification
b. acid rain
c. deforestation
d. bioaccumulation
e. biological magnification
a
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Which soil component(s) have a negative charge that attracts positively charged mineral ions in soil water?
a. sand b. silt and sand c. clay d. humus e. clay and humus
In gene therapy, what is transferred into an
individual’s body cells?
a. new genomes b. recombinant DNA c. GMOs d. bacterial plasmids e. DNA libraries
During voice production, air rushing through which structure causes the vocal cords to vibrate?
a. larynx b. pharynx c. glottis d. epiglottis e. bronchus
Oxygen consumption can be used as a measure of metabolic rate because oxygen is
A. necessary for ATP synthesis by oxidative phosphorylation B. necessary to replenish glycogen levels C. necessary for fermentation to take place D. required by all living organisms E. required to break down the ethanol that is produced in muscles