Small circular pieces of DNA that are not associated with the bacterial chromosome are called _______
A. heteroduplex
B. plasmids
C. relaxosome
B
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When a Bacillus anthracis population suddenly must form spores to survive a harsh nutrient poor environment, how do the cells obtain energy?
A) Cells in a growth phase that have not used up all of their energy will be the only ones to make endospores, which is why relatively few endospores are often made from a large population. B) Intracellular energy reserves are quickly made available to produce endospores. C) Slow responding cells are cannibalized by others that already began spore formation. D) Global regulation is initiated to minimize energy waste in biosynthetic pathways and catabolic pathways are increased to consume remaining usable substrates to fuel spore formation.
Which base in an anticodon will pair with the base adenine in a codon?
A. thymine B. cytosine C. guanine D. uracil
An ecologist that studies cycling of nutrients and the flow of energy between the biotic components of
an ecological community and the abiotic environments is a(n)______.
a. behavioral ecologist d. ecosystem ecologist b. population ecologist e. organismal ecologist c. community ecologist
Gibbons are able to swing through the trees by
their arms thanks to ___ joints.
a. fibrous b. cartilaginous c. synovial d. hinged joints e. gliding joints