The bacteria species known as escherichia coli is capable of using oxygen to produce energy in a process known as respiration. it can also produce energy if no oxygen is available by using a process called fermentation. this ability is best described by which of these characteristics of living things? a) use a common genetic code b) reproduce and produce offspring c) respond to stimuli in the environment d) move actively through the environment

ocean expansion, global warming is melting icebergs and causing water levels to rise.

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

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