Which of the following has to be a haploid cell?
a. a cell with 6 chromosomes
b. a cell with 3 chromosomes
c. a cell with 12 chromosomes
d. a cell with 24 chromosomes
B
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Which external structure protects bacteria from phagocytosis?
A. Slime layer B. Capsule C. Fimbriae D. Cell membrane
Refer to Figure 37-4. Which of the fruits listed would be classified as an accessory fruit?
a. a
b. b
c. e
d. i
e. k
Which statement is true?
A) Sharks have a skeleton made of bone, while ray-finned fishes have flexible skeletons made of cartilage. B) Ray-finned fishes have a skeleton made of bone, while sharks have flexible skeletons made of cartilage. C) Sharks have a series of rod-shaped bones in their muscular pectoral and pelvic fins, while lobe-fins have flexible skeletons made of cartilage.
Which of the following is an animal virus?
A. tobacco mosaic virus B. T4 virus C. chicken pox virus D. lambda virus