Drosophila melanogaster was the organism of choice for the study of
a. the process of fertilization.
b. the process of cell aggregation to form a multicellular organism.
c. DNA replication.
d. animal genetics.
Ans: d. animal genetics.
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The polysaccharide that helps strengthen cell walls in transport tissues of hornworts is called ____
a. xylan b. chlorophyll c. lignin d. chlorophyll a e. chlorophyll b
Earth has not been visited by aliens, according to your textbook
a. True b. False Indicate whether the statement is true or false
The difference between deoxyribose and ribose is that ribose
a. is a six-carbon sugar and deoxyribose has only five carbons. b. bonds only to thymine, not uracil. c. has one more oxygen atom than deoxyribose has. d. is all of the above.
Ova are
a. male gametes. b. female gametes. c. specialized for motility. d. both a and c.