Which of the following is NOT true of exotoxins?
A. exotoxins are part of the bacterial cell wall
B. they are usually made of protein
C. Some are enterotoxins
D. Some are neurotoxins
E. All of the above are TRUE of exotoxins
Ans: A. exotoxins are part of the bacterial cell wall
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Answer the following statements true (T) or false (F)
1. Saltwater fishes are hypoosmotic. 2. The number of aquatic species increases in acidic waters. 3. Temperature tends to decline with longitude. 4. Rain shadows are found on the windward sides of mountains. 5. Land next to the sea has more variable climate than land farther from the sea.
Mammals underwent an evolutionary "explosion" or major adaptive radiation in the
a. Mesozoic. b. Cambrian. c. Triassic. d. Devonian. e. Cenozoic.
Which of the following explains why females are more likely to be "choosy" about mating partners than males?
a. Females are more limited in the number of offspring they can produce than males are b. Eggs require more energy to produce than sperm c. Males can fertilize the eggs of multiple females, while a female's egg can only be fertilized by a single male d. All of these
The longest portion of the large intestine region is known as the _____________.
A. lumen B. appendix C. rectum D. cecum E. colon