The pores that facilitate gas exchange in plant leaves are called

A) stomata.
B) guard cells.
C) vacuoles.
D) plasmodesmata.


Answer: A

Biology & Microbiology

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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

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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.

Biology & Microbiology

Which organism obtains energy by removing electrons from inorganic molecules?

A. Chemoautotroph B. Chemoheterotroph C. Photoautotroph D. Photoheterotroph E. Electroautotroph

Biology & Microbiology

The genomes of phiX174 and fd are

A. double stranded DNA. B. single stranded DNA. C. single stranded RNA. D. double stranded RNA.

Biology & Microbiology