If we place a given trait on a phylogenetic tree that we have already constructed using other data, we can:
a. generate a hypothesis about when and how this trait evolved.
b. generate a hypothesis about the evolutionary history of the species in which those traits ap-pear.
c. Neither of the above.
d. Both of the above.
A
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Embryogenesis in plants is about the same process as _____
A) cleavage in animals B) gastrulation in animals C) organogenesis in animals D) cleavage, gastrulation, and organogenesis in animals
The number of similar anatomical parts called whorls that make up a complete flower is
A. five. B. two. C. one. D. four. E. three.
Scientists use recombinant DNA technology to genetically engineer bacteria to produce substances such as human insulin. Why are bacteria used in this process?
A) bacteria are unicellular B) bacteria rarely undergo mutations C) bacteria lack DNA D) bacteria reproduce rapidly
Which of the following is not a function of the replicative form (dsDNA) of phage phiX174?
A. Function to direct the synthesis of plus-stranded DNA. B. Function to direct the synthesis of minus-stranded DNA. C. Function to direct the synthesis of more RF copies. D. Function to direct the synthesis of mRNA.