In ________ ________, cells are tagged with a fluorescent dye and injected into a flowing, progressively narrowing stream of fluid, forcing one cell at a time through a laser beam that scatters its fluorescence to a detector.
What will be an ideal response?
flow cytometry
flowcytometry
flow
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What absorbs the photons of light in photosynthesis?
a. carotenoids b. chlorophyll c. chlorophyll and carotenoids d. the thylakoid membrane e. inner membrane of the chloroplast
A lab technician is preparing to dispose of a rat and a frog that were euthanized earlier in the day for a scientific study. Although the two animals died at the same time, the rat has rigor mortis while the frog does not yet show any signs of it. What is the best explanation for this time difference in the onset of rigor mortis?
A. The rat has higher concentrations of myoglobin in its muscles than the frog. B. All the frog's muscles are fast-twitch muscles. C. The rat's muscles have a greater density of myofilaments than the frog's muscles. D. The frog has lower concentrations of glycogen in its muscles than the rat. E. The rat is able to synthesize more ATP than the frog. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about rigor mortis? 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?
All chordates have pharyngeal gill slits at some point during their development
Indicate whether the statement is true or false
Choose the true statement(s) about the evolutionary divergence of horses in North America. Check all that apply.
_____ Most changes are seen as adaptations for life in grassland habitats. _____ The general trends during horse evolution are increase in body size, lengthening of limbs, reduction of digits on both sets of limbs, and tooth development for a grazing life style. _____ Horse evolution is unusual in that rates of change were uniform and constant throughout most lineages. _____ Living lineages of horses show much less diversity than existed in the past.