Before plowing a field, a farmer thought the bare field looked weed-free. Three days after plowing and turning over the soil, he was amazed to see thousands of tiny seedlings. What is the most likely reason for the mass germination of seeds?
A) large seeds that needed soil disturbance to germinate
B) small seeds that need light to germinate
C) small seeds that were scarified by exposure to plow
D) large seeds that needed exposure to higher levels of oxygen to germinate
Answer: B
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Enantiomers are a pair of stereoisomers that are mirror images of each other. Which of the following would also be true of this pair of structures?
A. They will have different melting points. B. They will have different densities. C. They will have superimposable structures. D. They will have the same molecular weight. E. If basic molecules, they will have the same pKa.
Cellulose is a polymer of ________, a common monosaccharide.
Fill in the blank(s) with the appropriate word(s).
Which of the following has the most energy?
a. phosphoglycerate (PGA) b. ribulose bisphosphate (RuBP) c. phosphoglyceraldehyde (PGAL) d. glucose e. rubisco
Why are ferns not well adapted to desert areas?
What will be an ideal response?