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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The genomes of phiX174 and fd are
A. double stranded DNA. B. single stranded DNA. C. single stranded RNA. D. double stranded RNA.
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.
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
Which organism obtains energy by removing electrons from inorganic molecules?
A. Chemoautotroph B. Chemoheterotroph C. Photoautotroph D. Photoheterotroph E. Electroautotroph