Four __________ glands make a hormone that acts on bone and kidney cells and raises blood calcium level.

Fill in the blank(s) with the appropriate word(s).


parathyroid

Biology & Microbiology

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The infectious dose

A. is the same for all microorganisms. B. may be 10-100 cells for Salmonella. C. is expressed as ID50. D. is defined as the number of microbes necessary to ensure infection. E. is expressed as ID50 AND is defined as the number of microbes necessary to ensure infection.

Biology & Microbiology

The Punnett square illustration above shows

that theoretically a. half of human sperm carry a Y chromosome. b. half of human zygotes are XY. c. all zygotes carry an X chromosome. d. gender depends upon which type of sperm fertilizes the egg. e. all of these are true

Biology & Microbiology

Human haploid cells have how many chromosomes?

a. 12 b. 23 c. 46 d. 69 e. 92

Biology & Microbiology

The epigenetic state of a cell is called its ____________________. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology