A clam is a(n)
A) arthropod. B) mollusk. C) echinoderm. D) chordate. E) arachnid.
B
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Based on DNA hybridization, humans and chimpanzees are the same species
Indicate whether this statement is true or false.
Ruminants have how many chambers in their stomachs?
a. one b. two c. three d. four e. five
Many human behavioral traits have both genetic and environmental components. Bipolar disorder has long been known to be familial, and more recently a number of genes and/or SNPs have been found to be involved
What are three or more reasons that this research has been hampered?
Bacteria use restriction enzymes to ____.
A. integrate viral DNA B. destroy viral DNA C. prevent mutation of their DNA D. copy their genes E. inhibit the expression of some of their genes