Some vertebrate animals have vertebrae that lack a centrum

a. true
b. false


Answer: a. true

Biology & Microbiology

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HLAs are responsible for immune-mediated organ transplant rejection

Indicate whether the statement is true or false.

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Atoms of a single element that possess different numbers of neutrons are called:

A. isomers. B. polymers. C. ions. D. isotopes. E. monomers.

Biology & Microbiology

Under the Biological Speces Concept, what criterion is used to assign populations of organisms to the same biological species?

A. Being able to interbreed and produce fertile offspring B. A very similar appearance C. Having 99% of their genes in common D. Responding the the environment in the same way

Biology & Microbiology

A ________________ is a protective protein coat that surrounds the nucleic acid of the virus.

A. Capsid B. DNA C. Pathogen D. Epidemic

Biology & Microbiology