All of the following could be used to describe some aspect of a cartilage cell EXCEPT
a. chondrocyte.
b. calcium salts.
c. ground substance.
d. chondroblast.
e. matrix.
B
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Which of the following is primarily responsible for the maternal effect?
A. Sperm cells B. Oocytes C. Nurse cells D. Placenta
A tube coagulase test was performed on catalase-positive, gram-positive cocci that were ?-hemolytic and grew on mannitol salt agar. The tube was checked after overnight incubation and was negative. Which of the following statements explains this discrepancy?
a. A tube coagulase should not be performed on a catalase-positive organism. b. A ?-hemolytic colony, which is catalase positive and grows on mannitol salt, is normally coagulase negative. c. The test should have been read in 1 to 4 hours in case any hemolysins are present. d. No discrepancy is present; the results are accurate.
A molecule of a saturated triacylglycerol contains:a
the maximum number of double bonds between carbons in the fatty acid chains. b. the maximum number of triple bonds between carbons in the fatty acid chains. c. the maximum number of hydrogen atoms in the fatty acid chains. d. fatty acid chains with both amino and carboxyl groups. e. alternating single and double bonds between carbons in the fatty acid chains
Which is a basic difference between gymnosperms and flowering plants?
a. Gymnosperms produce “naked” ovules, while flowering plants produce “naked” seeds. b. Gymnosperms produce only cones, while flowering plants produce both flowers and cones. c. Gymnosperms produce seeds that are enclosed within a fruit, while flowering plants produce seeds borne naked. d. Gymnosperms produce seeds borne naked, while flowering plants produce seeds enclosed within a fruit. e. Gymnosperms produce flowers that have floral parts arranged in threes, or multiples of threes, while flowering plants have floral parts arranged in fours or in multiples of four.