Abnormal levels of which neurotransmitter may be involved in producing the symptoms of ADD?
A) acetylcholine
B) dopamine
C) serotonin
D) GABA
B
Biology & Microbiology
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In general, the form of energy that is least useful to living organisms is
a. chemical. b. electrical. c. heat. d. light. e. sound.
Biology & Microbiology
Group B streptococci only causes disease in infants.
Answer the following statement true (T) or false (F)
Biology & Microbiology
Sickle cell anemia is a condition in which red blood cells exhibit a characteristic "sickle" shape. This arises from a mutation or change in one of the amino acids found in hemoglobin. A single amino acid mutation would directly affect a protein's _______ structure.
A. primary B. secondary C. tertiary D. quaternary E. peptide
Biology & Microbiology
Which of the following is the least limiting level of classification?
a. Class b. Genus c. Order d. Species
Biology & Microbiology