The notochord is most closely associated with the:
a. nervous system
b. spinal cord
c. skeletal system
d. skin system
e. nervous system and spinal cord only
c
Biology & Microbiology
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Of the following organisms, which can be described as a fastidious obligate intracellular parasite that multiplies by binary fission in the cytoplasm of host cells and infects humans as accidental hosts in most cases?
a. Rickettsia b. Chlamydia c. Calymmatobacterium d. Coxiella
Biology & Microbiology
What is an example of a +/- interaction?
A. competition B. mutualism C. commensalism D. predation E. both competition and parasitism
Biology & Microbiology
What is the photopigment in rod cells called?
A. photopsin B. rhodopsin C. opsin D. carotene E. melanin
Biology & Microbiology
In human oogenesis, how many chromosomes does an oogonium carry?
A) 22 B) 23 C) 44 D) 46 E) 92
Biology & Microbiology