Which of the following is related to an increase in the chance of breast cancer?
A) early menopause
B) pregnancy
C) early first menstruation
D) breast-feeding
C
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Which of the following is not a component of a nucleotide?
A. a five-carbon sugar B. one or more phosphate groups C. a nitrogen-containing base D. a carboxyl group E. a five-carbon sugar, one or more phosphate groups, a nitrogen-containing base and a carboxyl group are all components of nucleotides.
Large-scale evolutionary change, leading to new body plans and major taxonomic divisions, is termed "________"
a. adaptive radiation b. diversification c. microevolution d. macroevolution
Periderm is produced by:
a. xylem. b. cork cambium. c. pith. d. cortex. e. phloem.
Malpighian tubules are the excretory system attached to the gut in
A. earthworms. B. insects. C. planarians. D. humans.