The significance of the Hershey and Chase
experiments in which 32P and 35S were used is that
a. DNA labeled with 35S and proteins labeled with
32P can be traced in the course of an experiment.
b. they demonstrated that DNA labeled with 32P is
transferred from the bacteriophage to the virus.
c. they established that proteins labeled with 35S
become deactivated and unable to be transferred.
d. they demonstrated that bacteriophages transfer
their DNA, not their protein coats, into their
hosts.
e. DNA may be the hereditary material; although,
bacteriophages transfer both DNA and proteins
into their hosts.
Answer: d
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Diatoms
A. can reproduce asexually. B. are photosynthetic with frustules composed of two halves. C. are motile by virtue of having flagella. D. are photosynthetic with frustules composed of two halves and can reproduce asexually.
A researcher is studying fairy shrimp in a desert pond that is also inhabited by spadefoot
toads. Which of the following is true regarding these animals?
a. They share the same niche. b. They share the same habitat. c. They are both detritivores. d. They have the same resource requirements
Due to our increasing ability to analyze DNA sequences and other molecular data of organisms, scientists are more
often classifying organisms by their:a. structural differences. b. structural similarities. c. evolutionary history. d. selective adaptations. e. behavioral similarities
Segmentation is the subdivision of the body into segments. True segmentation is found in which of the following phyla?
A. Mollusca, Chordata, Annelida B. Arthropoda, Chordata, Porifera C. Annelida, Mollusca, Arthropoda D. Arthropoda, Annelida, Chordata E. Echinodermata, Platyhelminthes, Cnidaria