In a given strand of DNA, complementary
bases are connected to each other by
a. ionic bonds.
b. polar covalent bonds.
c. hydrogen bonds.
d. peptide bonds.
e. nonpolar covalent bonds.
C
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Angiosperms that originated as hybrids resulting from a cross between two closely related species are known as ____
a. paleopolyploids b. autopolyploids c. allopolyploids d. hexapolyploids e. tetrapolyploids
Duplicated chromosomes linked together at
their centromeres at the beginning of meiosis are appropriately called what kind of chromatids? a. mother b. daughter c. sister d. homologous e. haploid
The assumption that there was little free oxygen in
the earth’s first atmosphere is supported by evidence derived from the study of a. ancient iron-containing rocks. b. the ancient atmosphere. c. oceanic sediments. d. moon rocks that formed at the same time as the earth. e. none of these.
T or F: a lever amplifies the force of movement
What will be an ideal response?