Buoyant force
What will be an ideal response?
net upward force exerted by a fluid on a submerged or immersed object
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The PCR technique requires a DNA polymerase from an organism that can endure high heat, such as Thermus aquaticus. What step of the protocol makes the heat-stability most necessary?
A. Synthesis B. Primer annealing C. Denaturation D. Antibody binding 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 the PCR technique? 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?
A child swinging on a swing utilizes which type(s) of energy?
a. kinetic energy only because the child is in constant motion b. potential energy only, because the child has to invest energy to get the swing to move c. chemical energy only, because it is the child's metabolism that powers the muscles that make the swing move d. kinetic and potential energy only, but in constantly changing ratios: when changing direction it is pure potential energy; at the bottom of the arc, it is pure kinetic energy e. kinetic, potential, and chemical energy: the child powers the swing with chemical energy in the muscle, cells and the swing moves like a pendulum with changing ratios of kinetic and potential energy.
Karyotype analysis
a. is a means of detecting and reducing mutagenic agents. b. is a surgical technique that separates chromosomes that have failed to segregate properly during meiosis II. c. is a diagnostic tool to detect chromosomal mutations. d. substitutes defective alleles with normal ones. e. fits all of these descriptions.
In the accompanying figure of Jones and Reithel's work with snapdragons, what is the most likely outcome if these plants were in a natural setting?
A) A 2% change is too small to be significant, so yellow and white flowers will remain in roughly equal percentages in future generations. B) Yellow and white flowers will oscillate in frequencies, depending on environmental conditions such as rainfall. C) Yellow flowers will continue to increase in frequency, as compared to white flowers, over time. D) Because the yellow trait is recessive, yellow flowers will ultimately take over the population.