If you could stick a microscopic pin into the
center of a bacterium, what would the order of
the structures you would encounter from the
outside in?
a. capsule, cell wall, plasma membrane,
cytoplasm
b. cell wall, capsule, plasma membrane,
cytoplasm
c. plasma membrane, cell wall, capsule,
cytoplasm
d. cell wall, plasma membrane, capsule,
cytoplasm
e. capsule, plasma membrane, cell wall,
cytoplasm
A
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Heterochromatic regions at the ends of chromosomes are
A) centromeres. B) euchromatin. C) telomeres. D) DNA hubs.
As xylem tissue is forming, its still-living cells deposit secondary wall material on the inner surface of their primary wall, but do not cover over the ____
a. perforation plates b. pits c. pectins d. vessel elements e. plasmodesmata
_____ refers to the process by which microbes gain a more stable foothold at the portal of entry though interaction of their molecules with host cell receptors.
Fill in the blank(s) with the appropriate word(s).
Which habitat would most likely have the greatest species richness?
a. prairie b. savanna c. tundra d. temperate desert e. tropical rain forest