First phase of mitosis; characterized by the condensation of the chromatin; chromosomes are visible, but scattered in the nucleus.
What will be an ideal response?
prophase
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A bacteria contains two copies of the lac operon; one on the bacterial chromosome and one on a plasmid. The lacO site on the chromosomal lac operon is mutated and non-functional whereas the lacO site on the plasmid is functional. What is the most likely outcome for the bacterial cell when glucose is declining and lactose is present?
A. Expression of lac structural genes on the chromosome and plasmid will decrease because two copies of the lacO site are needed for repression of the lac operon. B. Expression of lac structural genes on the chromosome and the plasmid will increase because more repression of the lac operon occurs as glucose decreases. C. Expression of lac structural genes on the chromosome and plasmid will increase because the lacO site does not affect the CAP protein that activates the operon. D. Expression of lac structural genes will not change because the lacO site is not involved in repression of the lac operon.
Morphology refers to the ____ of an organism
a. reproductive ability b. appearance c. habitat d. lifespan e. movement
In Connell's experiments with the barnacles Chthamalus stellatus and Semibalanus balanoides, the potential distribution of each species, in the absence of the other, is known as the
A. realized niche B. competition zone. C. fundamental niche. D. tidal boundary. E. idealized niche.
How do bioluminescent animals deal with light?
a. They absorb light from the environment. b. They reflect light to the environment. c. They produce their own light. d. They transmit light form the environment.