Of all the elements that occur on earth, how many are found in your body?

A) 4
B) 10
C) 25
D) 90
E) 100


C) 25

Biology & Microbiology

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Trickling filters may be used in place of activated sludge in secondary sewage treatment

Indicate whether this statement is TRUE or FALSE.

Biology & Microbiology

Archaea and bacteria diverged:

a. about 3 billion years ago. b. about 100,000 millions years ago. c. about 1 billion years ago. d. about 2 billion years ago. e. about 10,000 million years ago.

Biology & Microbiology

Evidence that parthenogenic whiptail lizards are derived from sexually reproducing ancestors includes _____

A) the requirement for male-like behaviors in some females before their partners will ovulate B) the development and then regression of testes prior to sexual maturation C) the observation that all of the offspring are haploid D) the persistence of a vestigial penis among some of the females

Biology & Microbiology

Using the formula determine the original cell density in the sample: OCD = Number of CFU/Amount plated x dilution factor You counted 72 colonies on a plate in your dilution series. The plate was inoculated with 1.0ml from a 10^-4 test tube, what is the OCD?

What will be an ideal response?

Biology & Microbiology