The primary stain used in the technique shown in Image A is:

a) Aldehyde fuchsin
b) Carbol-fuchsin
c) Leucofuchsin
d) Acid fuchsin


Ans: b) Carbol-fuchsin

Biology & Microbiology

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Circulatory systems compensate for _____

A) temperature differences between the lungs and the active tissue B) the slow rate at which diffusion occurs over large distances C) the problem of communication systems involving only the nervous system D) the need to cushion animals from trauma E) the need that fetal organisms have for maintaining an optimal body temperature

Biology & Microbiology

Measurements of bill length in a population of seed-eating birds reveals two distinct groups: small-billed individuals feeding on soft-shelled seeds and large-billed individuals feeding on hard-shelled seeds

This bimodal distribution most likely resulted from A) stabilizing selection. B) natural selection. C) directional selection. D) disruptive selection.

Biology & Microbiology

Refer to Figure 40-1. Which of the following structures contributes to protecting the skin from the

effects of UV irradiation? a. 3 b. 5 c. 7 d. 10 e. 11

Biology & Microbiology

Organisms demonstrated by the technique shown in Image A belong to the group known as:

a) Spirochetes b) Bacilli c) Mycobacteria d) Fungi

Biology & Microbiology