Secondary tumors are associated with which of the following?
a. benign tumors
b. malignant tumors
c. all neoplasms
d. benign tumors and all neoplasms
Answer: b. malignant tumors
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Which amino acid is most soluble in water?
A. Valine B. Glycine C. Leucine D. Serine 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 know about solubility in water? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
Which of the following statements regarding xylem vessels in angiosperm trees is not true?
A. Vessels allow angiosperms to have higher rates of water flow through stems. B. Angiosperms are able to fix more CO2 and have higher growth rates due to vessels. C. Vessels are rigid and strong and do not require additional support cells. D. Angiosperm wood structure has a high degree of diversity due to the presence of several distinct cell types. E. Angiosperms primarily use vessels to transport water and minerals.
Why does countercurrent exchange optimize gas exchange across some gills?
a. It sustains an optimal thermal environment for gas exchange. b. It optimizes perfusion to the respiratory surface. c. It sustains an optimal respiratory gas concentration gradient, allowing diffusion to occur across the entire respiratory surface. d. It optimizes delivery of the respiratory medium to the respiratory surface. e. It minimizes the area of diffusion.
Plants produce biomass by taking in energy, CO2, and nutrients from the environment; consumers eat much of this biomass, but not all. However, ecosystems do not indefinitely accumulate large quantities of organic matter over time. Why not?
What will be an ideal response?