Assuming resting conditions at sea level, what is the partial pressure of oxygen in air?

A)160mmHg
B)100mmHg
C) 80 mm Hg
D) 46 mm Hg
E) 40 mm Hg


Answer: A)160mmHg

Biology & Microbiology

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A researcher has a petri dish containing several species of bacteria, but no viruses. She notices that the population of E. coli in her petri dish has no antibiotic resistance

Two weeks later, she reassesses the bacteria and finds that the E. coli have acquired antibiotic resistance. How could this have happened? A. E. coli acquired the genes conveying antibiotic by conjugation with other bacterial cells. B. E. coli acquired the genes conveying antibiotic by transformation. C. Spontaneous mutations conveying antibiotic-resistance arose in the E. coli population of the petri dish. D. All of these answer options are correct.

Biology & Microbiology

EGF (epidermal growth factor) activates cell division by binding ________.

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

Biology & Microbiology

Birds are considered homeothermic

Indicate whether the statement is true or false

Biology & Microbiology

In an autosomal dominant disorder such as Huntington's disease, two carrier parents have the probability of passing

the gene onto ____ percent of their children.

a. 0 b. 25 c. 50 d. 75 e. 100

Biology & Microbiology