If a person is unable to clot blood properly, which of the following might be lacking?
A) red blood cells B) platelets C) ions D) white blood cells
Answer: B
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Linnaeus lumped all of the worm-like animals into the category Vermes (Vermis is Latin for worm). Is this a valid classification scheme?
A. Yes, because all worm-like animals are more closely related to each other than they are to other animals. B. No, because some worms are protists. C. No, because the worm-like body plan has appeared many times through evolutionary history and is not a useful trait for classification. D. Yes, because all worms are members of the same phylum.
A sudden loud sound such as an explosion might impair hearing by damaging which of the following?
a. hair cells in the organ of Corti b. the vestubular nerve c. the utricle and saccule d. the otoliths e. the endolymph
Which structure surrounds and protects the root apical meristem?
a. the pericycle b. the root cap c. the root hairs d. the endodermis
Optical density and viable cell concentration are LEAST proportional to each other during
A) lag phase. B) exponential growth phase. C) stationary phase. D) death phase.