The brain is a part of ______ nervous system.
a. autonomic motor
b. central
c. sensory
d. somatic motor
Ans: b. central
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The best defense against arboviruses is ________.
A. vaccination B. prophylactic rifampin C. prompt treatment with acyclovir D. vector control
Answer the following statements true (T) or false (F)
1. The first truly bipedal primates were the australopithecines. 2. Our species, Homo sapiens, had been in existence for only somewhat more than 50,000 years when it moved out of Africa and replaced Neanderthal Man, another species of human, about 30,000 years ago. 3. Several species of humans have occurred together in the same time and place in the past. 4. The most recent fossil and DNA evidence supports the idea that modern humans (Homo sapiens) evolved from a single stock from Africa rather than from multiple stocks in different parts of the world.
The source of variation among microorganisms that were once identical is
A. antibiotic resistance. B. virulence factors. C. sigma factors. D. mutation.
one of the main energy transformers of cells
A. lysosome B. vacuole C. mitochondrion D. Golgi apparatus E. peroxisome