One generalization of the cell theory is that
a. all cells have a nucleus.
b. all cells have cell walls.
c. the cell is the smallest unit that displays the
properties of life.
d. cells can arise from nonliving matter.
e. all cells are microscopic
C
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A transcriptional repressor contains an amphipathic helix. Which of the following changes within the repressor would most likely disrupt its function?
A. serine to threonine B. aspartate to glutamate C. leucine to valine D. leucine to lysine E. valine to methionine
Food preference in garter snakes is a learned behavior
a. True b. False
The most inclusive level of organization is exemplified by which of the following?
A. Heart B. Carbon atom C. DNA D. Zebra E. Red blood cell
The ________ drift up to the stratosphere, where UV radiation causes them to break down to their atomic form, one of which breaks down ozone
Fill in the blank(s) with correct word