The ________ represents the sporophyte generation of a conifer, and the ________ produces gametophytes
A) cone; tree
B) tree; cone
C) tree; pollen
D) seed; tree
Answer: B
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The connection between unpasteurized milk and brucellosis in humans was made by
A. Evans. B. Pasteur. C. Koch. D. Fleming
A pure-breeding fruit fly with curled wings mates with a pure-breeding fruit fly with normal (straight) wings. The F1 mate with each other to produce an F2 generation that consists of 160 flies with curled wings and 80 with straight wings. What can you infer from this observation?
A) Curled wings is a recessive trait. B) The dominant curled wing allele is also a recessive lethal. C) Wing shape is controlled by two codominant alleles. D) Two interacting genes determine wing shape. E) All of the hybrid F1 flies had straight wings.
In your own words and with your own examples, explain fully how cells are limited in size and how some cells have modifications that allow them to be larger or more adapted to a particular function in spite of these limitations
What will be an ideal response?
The function of a protein is dependent upon the shape into which the chain of amino acids folds. Many noncovalent interactions are responsible for maintaining the protein's shape. Assume you have isolated a protein from an organism in its proper shape, and you have treated it with an enzyme that selectively targets and breaks only the peptide bonds in the proteins. Would the protein retain its shape under these conditions?
a. Yes; because the noncovalent interactions that determine the shape of a protein are stronger than the peptide bonds. b. No; while the noncovalent bonds determine the shape of a protein, the peptide bonds are required to hold the amino acids together. c. Yes; but the shape would be affected to a greater extent by changes in temperature. d. Yes; once noncovalent bonding determines the shape of a protein, the peptide bonds are no longer necessary.