The pores that facilitate gas exchange in plant leaves are called
A) stomata.
B) guard cells.
C) vacuoles.
D) plasmodesmata.
Answer: A
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Mutations that occur in one member of a gene pair that arose from gene duplication may create _____
A) a pseudogene B) a gene with a new function C) a gene family with two distinct but related members D) a pseudogene, a gene with a new function, and a gene family with two distinct but related members
Select the compound that contains the most energy:a
AMP b. ADP c. ATP d. Pi e. AMP, ADP, ATP and Pi all contain equal amounts of energy.
Which organism obtains energy by removing electrons from inorganic molecules?
A. Chemoautotroph B. Chemoheterotroph C. Photoautotroph D. Photoheterotroph E. Electroautotroph
The genomes of phiX174 and fd are
A. double stranded DNA. B. single stranded DNA. C. single stranded RNA. D. double stranded RNA.