If you observe rod-shaped, pink cells on a slide that had just been Gram stained, you can assume that their cell envelope contains endotoxin.

Answer the following statement true (T) or false (F)


True

Biology & Microbiology

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Refer to the table above. Because the shark rectal gland functions only when ATP molecules are present, what can you infer about the movement of Na+, K+, and Cl-?

A) Movement of these ions from circulation into the rectal gland is an active process. B) Movement of these ions takes place from a region of higher concentration to a region of lower concentration. C) These ions move into the rectal gland down their concentration gradient. D) The rectal gland is unable to concentrate these ions.

Biology & Microbiology

When DDT was first introduced, insects were very

susceptible to it. The development of resistance to DDT by insects was the result of a. special creation. b. natural selection of forms that expressed genes for resistance. c. the high biotic potential of insects. d. a naturally occurring example of inheritance of acquired characteristics. e. mutation induced by DDT.

Biology & Microbiology

Bison are a ________ species in the prairie, helping to maintain the grasses, opening water holes and wallows, and creating the ecological framework for the prairie ecosystem

Fill in the blank(s) with correct word

Biology & Microbiology

Figure 15.7 The accompanying figure illustrates ____.

A. the production of recombinant DNA B. probing for transferred genes C. DNA fingerprinting D. DNA sequencing E. producing radioactive probes

Biology & Microbiology