The thin, circular layers of compact bone are called
a. osteoblasts.
b. epiphyseal plates.
c. osteoclasts.
d. osteons.
e. spicules.
D
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Pasteur's experiments proved that
A) Cells cannot survive in swan necked flasks B) In order to grow, cells need to be supplied with oxygen C) Spontaneous generation can only occur if nutrient broth is left open to the environment D) Sterilizing nutrient broth prevents spontaneous generation E) Pre-existing cells present in the air can grow in sterilized nutrient broth
Ultraviolet radiation at the bactericidal wavelength destroy bacteria by
A. destroying endospores. B. damaging nucleic acid. C. preventing spore formation. D. denaturing proteins.
Bacteria differ from viruses in that bacteria
A) Have DNA and RNA. B) Are composed of cells. C) Can live without a host. D) All of the above.
Patches of populations that undergo local periodic extinction and recolonization are called what?
A. Metapopulations B. Randomly spaced populations C. Uniformly spaced populations D. Endangered populations E. Oversized populations