Consider the following electronegativity values:Boron (B) = 1.8Carbon (C) = 2.5Chlorine (Cl) = 3.2Selenium (Se) = 2.6Which of the following bonds is the most polar?
A. B-Cl
B. Se-Cl
C. C-Cl
D. It cannot be determined from the information provided.
Answer: A
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What adaptation(s) persisted in the human population due to the selective pressure of humans living in larger social groups and civilizations?
a. Blushing, which signals remorse and elicits forgiveness from peers b. Tears of emotion, which shows vulnerability and increases chances of receiving help c. Disease resistance d. A&B e. B&C f. A&C g. All of the above
The water in a damaged root is seeping between cells and not moving into the vascular tissue. What part of the root has been damaged?
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The large number of alveoli in mammalian lungs, the numerous lamellae in fish gills, the papulae of echinoderms, and the extensive tracheal system of insects are all adaptations that optimize what factor in the formula for Fick’s Law of Diffusion?
A. D B. A C. d D. Dp Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about gas exchange? 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?
Quorum sensing would most likely occur when:a
Dictyostelium senses cyclic AMP. b. tobacco plants are attacked by insects. c. bacteria reach a certain critical concentration. d. predator insects eat herbivorous insects. e. insulin binds to target cells.