Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through
a. plasmodesmata.
b. intermediate filaments.
c. tight junctions.
d. desmosomes.
e. gap junctions.
e. gap junctions.
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Investigators have found a new species bacteria that lives under both aerobic and anaerobic conditions. They hypothesize that different genes are expressed in each condition. What experiment could test this hypothesis and identify important genes?
A. Completely sequence the genome of the bacteria in both aerobic and anaerobic conditions B. Collect mRNA from both anaerobic and aerobic conditions and generate two cDNA libraries C. Measure levels of RNA Polymerase in both conditions D. Design primers to a specific region of the genome and sequence this region during both anaerobic and aerobic conditions Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about gene expression? transcriptional. Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
The earliest humans primarily used tools to ____
a. assist in locomotion b. provide protection c. facilitate the processing of food d. ward off predators e. construct shelters
A newly mated queen ant establishes an ant nest in an unoccupied patch of suitable habitat. Assuming that no disasters strike the nest, which of the following types of equation will best describe its population growth?
A) linear B) quadratic C) logarithmic D) logistic E) exponential
Which of the following statements about tunicates is incorrect?
A. Tunicates are sessile as adults. B. Tunicates are nonvertebrate chordates. C. Tunicate larvae can reproduce. D. Tunicates are all marine animals. E. Tunicate larvae are tadpole-like with all of the basic chordate characteristics.