Epigenetic mechanisms of gene regulation involve: (Select all correct choices)
A. changes to DNA sequences.
B. the way in which DNA is packaged within
chromosomes.
C. the way in which chromosomes are
organized into genomes.
B
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You are in a lab studying a new cell type that has been discovered. You observe a rigid cytoskeleton in this cell, along with a nucleus and a compartmentalized interior. How would you classify this cell?
A. as an advanced prokaryotic cell, because it has a rigid cytoskeleton B. as a primitive prokaryotic cell C. as a possible transitional cell from prokaryotic to eukaryotic D. as a eukaryotic cell that has to be heterotrophic E. None of the answers options is correct.
The rocky shore zone that has the greatest
diversity of life is the a. upper littoral. b. midlittoral. c. lower littoral. d. intertidal. e. neritic
Which statement is the correct interpretation of the graph?
A. The population of Didinium goes extinct with the addition of Paramecium on day 4.
B. The population of Didinium continues to increase and remains high even after the extinction of the Paramecium.
C. The population of Paramecium goes extinct with the addition of Didinium on day 8.
D. The population of Didinium increased but then went extinct after the population of Paramecium went extinct.
E. The population of Didinium is able to increase at the expense of the Paramecium population. After a brief period both populations are able to coexist.
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 the relationship between the two species? 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?
Reflection 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?
Members of the order Desulfovibrionales use which of the following as electron acceptors during anaerobic respiration?
A. CO2 B. Organic acids and alcohols C. O2 D. Elemental sulfur or sulfate