How are the spores of zygomycetes such as Rhizopus dispersed?
A. by the wind
B. by insects
C. by the rain
D. by swimming with flagella
E. by animals
A
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You are studying the function of a recently identified gene in C. elegans. You perform genetic screens for several months in an attempt to isolate loss-of-function gene mutations, but your efforts are unsuccessful. Your advisor suggests you try another approach to eliminate gene function. The best technique to accomplish this goal would be
A. to design a repressor to bind to the operon of this gene. B. use a histone deacetylase to induce a transcriptionally inactive state. C. use a C. elegans strain with a homozygous TFIID mutation to prevent the translation initiation complex from forming. D. use RNA interference to prevent mRNA translation. 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 loss-of-function mutations? 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?
You drive a nail into a tree that is 10 feet tall so that 5 inches of the nail is showing. You come back 10 years later. The tree is now 30 feet tall and only 3 inches of the nail is showing. This is because secondary growth of the tree is from the
A. root tip. B. intercalary meristem. C. apical meristem. D. lateral meristem. E. node.
Which of the following statements is true regarding the use of oligonucleotide primers in PCR?
A. Oligonucleotide primers must hybridize completely to the template DNA strand in order for PCR to proceed; nonhybridized DNA will be degraded. B. The use of oligonucleotide primers is obsolete with the Gibson method of seamless cloning; instead, DNA polymerase and DNA ligase are able to copy the DNA independently. C. Oligonucleotide primers must hybridize to the 5' end of the template strand leaving a 3' primer "overhang"; that sequence will be copied and incorporated into the daughter strands allowing seamless cloning to occur. D. Only a portion of the oligonucleotide primers need to hybridize to the 3' template DNA strand; the 5' "overhang" can contain a restriction site that will be copied during the second and all subsequent cycles of PCR.
Why does planting a cover crop help conserve soil?
I) controls weed populations II) reduces soil loss due to wind and water erosion III) increases soil nutrients when plowed under and allowed to decompose A) only I B) I and II C) II and III D) I, II, and III