The energy-releasing process that occurs in most organisms when oxygen is present is:

a. alcoholic fermentation.
b. aerobic fermentation.
c. aerobic respiration.
d. adenosine triphosphate.


b

Biology & Microbiology

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Which of the following substances is secreted by an endocrine gland?

a. Tears b. Breast milk c. Wax d. Saliva e. Hormones

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Suppose you are culturing tobacco in a petri dish at a 10:1 ratio of auxin to cytokinin. To promote only

shoot development you would

a. increase the cytokinin ratio b. increase the auxin ratio c. reduce the auxin level significantly and increase the cytokinin level slightly d. grow the tobacco in the dark e. grow the tobacco in the light

Biology & Microbiology

The element that is crucial to actual muscle contraction is

a. sodium. b. potassium. c. iron. d. magnesium. e. calcium.

Biology & Microbiology

An environmental testing laboratory is unable to identify a single-celled organism isolated from a well water sample.  Inspection of the microorganism with a compound microscope reveals that it uses pseudopodia for movement and is not enclosed within a mineral shell.  Based on this information, this organism can be classified to which supergroup?

A. Opisthokonta B. Alveolata C. Amoebozoa D. Excavata E. Rhizaria

Biology & Microbiology