The cell wall of plants is composed primarily of cellulose, which is a network of highly branched
____.
a. carbohydrates
b. nucleic acids
c. proteins
d. steroids
e. phospholipids
A
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In which of the following organisms would one expect to find flame cells?
a. grasshoppers b. rabbits c. planaria d. sea anemone
Which of the following is false?
a. Flowers often exhibit coevolution with their pollinators. b. Seeds often exhibit coevolution with their disseminators. c. The pollen grain forms from a haploid microspore. d. Megaspores are part of the female gametophyte generation. e. Megaspores and microspores arise through mitosis.
Physicians feel that the best way to differentiate between a fibroadenoma and a malignant tumor in the breast is through _____.
A. needle aspiration B. a biopsy C. a mammogram D. an MRI scan
A cell wall can increase a bacterium's virulence because cell wall lipid A
A) All bacteria have a cell wall and all are not pathogenic; therefore, cell walls do not contribute to virulence. B) Helps the bacterium attach. C) Resists phagocytosis. D) Destroys host tissues. E) is toxic