Excretion refers to the
A) Extrusion of sweat from the skin
B) removal of metabolic waste from the body
C) Elimination of bacteria from the body
D) Discharge of feces from the body
Answer: B) removal of metabolic waste from the body
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A colorless substrate acted on by the enzyme portion of the ligand to produce a colored product is known as a/an ________.
A. antibody B. serotype C. chromogen D. antigen
The ____ phylum of seedless vascular plants has about 1000 known living species, including those in the genera
Lycopodium and Selaginella; the gametophyte of some of these species cannot photosynthesize, and instead uses mycorrhizae to obtain nutrients
a. Hepatophyta b. Monilophyta c. Bryophyta d. Lycophyta e. Anthocerophyta
Peptide bonds form between
A. two amino groups. B. two carboxyl groups. C. one carboxyl group and one R group. D. one amino group and one carboxyl group. E. one R group and one amino group.
An example of a neurotransmitter that works by activation of G proteins is:
a. acetylcholine. b. nitrous oxide. c. endorphins. d. GABA. e. serotonin.