In the photosystem I reaction center of green plants, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called
A. P680.
B. P870.
C. P700.
D. chlorophyll II.
E. chlorophyll I.
Answer: C
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The plasma proteins in humans _____
A) maintain the blood's osmotic pressure B) transport water-soluble lipids C) carry out gas exchange D) undergo aerobic metabolism E) transport oxygen
Which of the following phrases INCORRECTLY finishes the following statement regarding morphogen distribution? Morphogen distribution inside the cell
A. is homogeneous. B. can be established prior to fertilization of the oocyte. C. can arise due to localized secretion by neighboring cells. D. is dependent on CAMs. E. is neither homogeneous nor dependent on CAMs.
Shoot branching is controlled mainly by the interaction of
A) auxins and gibberellins. B) auxins and cytokinins. C) gibberellins and cytokinins. D) cytokinins and abscisic acid.
A liger is a result from a male lion and a female tiger. Male ligers cannot produce offspring This is an example of
A. hybrid sterility. B. hybrid breakdown. C. a prezygotic mechanism. D. a prezygotic mechanism and hybrid sterility are correct. E. hybrid inviability.