Which of these molecules is typically double-stranded?
A. mRNA
B. rRNA
C. tRNA
D. DNA
D. DNA
Biology & Microbiology
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Which of the following does NOT occur in prophase
I of meiosis? a. cytokinesis b. pairing of homologues c. formation of a bipolar spindle d. crossing over e. condensation of chromosomes
Biology & Microbiology
Segmentation was first apparent in the
A. annelids. B. vertebrates. C. chordates. D. flatworms.
Biology & Microbiology
________ dating involves age-dating fossils with known time periods grouped into four eras that represent distinct ages in the history of the earth.
Fill in the blank(s) with correct word.
Biology & Microbiology
Structures of the skeletal system include all of the following except:
A) bone. B) nails. C) ligaments. D) cartilage.
Biology & Microbiology