Proteinaceous projections from the surface of a bacterium that are used to mediate conjugation are called sex __________, whereas projections that mediate attachment to surfaces such as host cells are called ________.
What will be an ideal response?
pili; fimbriae
pili, fimbriae
pili fimbriae
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During deep sleep, the brain is emitting ____
a. alpha waves b. beta waves c. delta waves d. gamma waves e. theta waves
In 1927, the U.S. Supreme Court upheld the right of states to use ____________________ as a means of preventing
reproduction by those deemed “unfit.” Fill in the blank(s) with the appropriate word(s).
Vascular plants and air-breathing animals first appeared during which time period?
a. Silurian period b. Permian period c. Cambrian period d. Ordovician period e. Cretaceous period
Sheathed bacteria form vegetative cells under favorable conditions and ________ under unfavorable conditions
a. endospores b. swarmer cells c. daughter cells d. cysts