A cell containing 98% water in its cytoplasm is placed in a 2% salt solution. It should
a. lose water
b. gain water
c. neither lose nor gain water
d. gain salt because of the high rate of diffusion
Ans: c. neither lose nor gain water
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Which of the following is not a part of the general viral reproductive cycle?
A. viral recognition of host surface proteins B. genome entry into the cell and immediate expression of some viral genes C. viral proteins are synthesized D. reverse transcriptase converts RNA to DNA E. fully assembled viruses are released
The sporophyte produces
A) gametes by mitosis, followed by meiosis. B) gametes by mitosis. C) gametes by meiosis. D) spores by mitosis. E) spores by meiosis.
Of the following bony/cartilaginous structures, which arises from neural crest cells?
A. Laryngeal Cartilage B. Occipital Bone C. Parietal Bone D. Petrous Part of Temporal Bone E. Sphenoid Bone
If the decolorizer is left on too long in the Gram-staining procedure, Gram-positive organisms will be stained ________ and Gram-negative organisms will be stained ________.
A. purple; pink B. purple; blue C. purple; colorless D. pink; pink