Heritable units of information about traits are called
__________. Fill in the blank(s) with the appropriate word(s).
Answer: genes
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Which of the following statements about DNA and RNA are true, and which are false?
a. DNA is a double-stranded molecule, and RNA is single-stranded. b. The nitrogenous base thymine is present in DNA and RNA, while uracil is present only in RNA. c. A hydrogen atom is present on the 3 carbon the ribose of DNA nucleotides, whereas a hydroxyl group is present at the same position on RNA nucleotides. d. The DNA and RNA molecules in a cell are copied by replication before a cell divides. e. RNA is the primary long-term storage molecule for genetic information in eukaryotic cells. f. Hydrogen bonds and phosphodiester bonds maintain the structure of DNA molecules, whereas only phosphodiester bonds are important for the structure of RNA molecules.
Derived character states shared by clade members are called
A. ancestral traits. B. homoplasies. C. synapomorphies. D. plesiomorphies. E. symplesiomorphies.
The "instructions" for making proteins are located in the
a. cell membrane. b. cell nucleus. c. cytoplasm. d. lysosome.
Why do bees visit flowers?
A. To maintain a healthy flower population B. To transfer pollen to the carpel C. To collect food and feed it to their larvae D. To help the plant reproduce