Which of the following is CORRECT about bacterial ribosomes?
A. They have two subunits and contain three RNA molecules.
B. They are a single complex without subunits, and contain three RNA molecules.
C. They have three subunits each containing an RNA molecule.
D. They have two subunits, the smaller one composed of protein only, and the larger one composed of RNA only.
E. They are a single complex containing one large RNA molecules and several proteins.
Answer: A
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The basis of cellular differentiation is
a. the operon b. selective gene expression. c. cloning. d. mutation.
Dandelions develop seeds by apomixis. What benefits does this strategy provide over vegetative or sexual reproduction?
A. Apomixis makes the dandelions more resistant to herbicides. B. Apomixis provides the benefits of seed dispersal, while maintaining a genome adapted to a given climate. C. Apomixis is beneficial in sheltered areas where wind pollination would be difficult. D. Apomixis is beneficial for plants that attract a diverse mix of bees and other pollinators. Clarify Question What is the key concept addressed by the question? What type of thinking is required? . Gather Content What do you already know about apomixis? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A specimen from a patient suffering diarrhea shows a one-celled organism in the microscope. The organism moves very slowly by protruding its cytoplasm. You would predict that the patient has an infection caused by ________.
A. Toxoplasma B. Entamoeba C. Plasmodium D. Trichomonas E. Giardia
The abundant presence of ammonite fossils in a large area indicates that the area was once part of an ocean.
a. true b. false