Which organism is LEAST likely to survive to reproduce?
A) A plant that has a sweet flavor before it flowers
B) A dark-furred rodent that comes out only at night
C) A seahorse that mimics the weeds in which it lives
D) A flower that produces a scent that attracts bees
E) A shrub that produces a toxin in its flower buds that repels deer from eating it
A
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The protein molecules on the surface of the P. aeruginosa bacteria are __________
a. antibodies b. antigens c. histamines d. capsids
Action potentials never vary in magnitude along a particular excitable membrane
Indicate whether the statement is true or false.
The statistical value obtained from a chi-square analysis refers to the probability that the deviations between the observed numbers and the expected numbers are caused by what?
What will be an ideal response?
In mid-December, a woman with insulin-dependent diabetes who had been on prednisone fell and received an abrasion on the dorsal side of her right hand. She was placed on penicillin. By the end of January, the ulcer had not healed, and she was referred to a plastic surgeon. On January 30, a swab of the wound was cultured at 35°C on blood agar. On the same day, a smear was made for Gram staining
The Gram stain showed large (10 µm) cells. Brownish, waxy colonies grew on the blood agar. Slide cultures set up on February 1 and incubated at 25°C showed septate hyphae and single conidia. The most likely cause of the infection is a A) gram-negative bacterium. B) dimorphic fungus. C) parasitic alga. D) yeast. E) protozoan.