Open circulatory systems are characterized by the presence of hemolymph as seen in annelids.
Answer the following statement true (T) or false (F)
False
Open circulatory systems are characterized by the presence of hemolymph but annelids do not have an open circulatory system.
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Of all organisms, prokaryotes are
a. the smallest. b. the most abundant. c. the most metabolically diverse. d. the most widespread. e. all of these.
What process could result from the natural selection explained by Darwin in his book The Origin of Species?
What will be an ideal response?
Which of the following shows the greatest promise as a cancer chemotherapy agent?
A) a drug that interferes with organismal cellular respiration B) a drug that prevents mitotic spindle from forming C) a drug that prevents crossing over D) a drug that prevents tetrad formation
Animal cells are permeable to water and urea but NOT to sucrose. The inside of a cell contains 1 M sucrose and 1 M urea and the outside 1 M sucrose and 2 M urea. The solution inside with respect to outside the cell is
A. hypotonic. B. hypertonic. C. isotonic. D. turgid. E. saturated.