The photoreceptor for photoperiodism and some other light-initiated plant responses is a group of blue-green pigmentsnamed:a
xanthophyll.
b. carotene.
c. chlorophyll.
d. phytochrome.
e. phycocyanin.
d
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The human genome project did not discover copy number variants because
A) people did not know they existed. B) the sequenced and overlapped DNA pieces were unique. C) there are too many to count, and they overlap among individuals. D) no restriction enzymes are known that cut at these sequences.
Where does germination of a pollen grain occur in a flowering plant?
a. in the anther. b. in the micropyle. c. on the surface of the corolla. d. on the stigma.
Accommodation involves the ability to
a. change the sensitivity of the rods and cones by means of neurotransmitters. b. change the curvature of the cornea. c. change the width of the lens by contracting or relaxing certain muscles. d. adapt to large changes in light intensity. e. see variations in color.
A. Define a gene
B. Consider two different species of yeast that have similar genome sizes. Is it likely that they contain the same number of genes? A similar number of chromosomes? What will be an ideal response?