Each type of cone cell is stimulated by a different color of light. In humans, a colorful scene is perceived as a combination of signals from three cone types. Which colors correspond to these three cones?IRedIIYellowIIIOrangeIVBlueVGreenVIPurple
A. I, V, and VI
B. I, III, and IV
C. II, IV, and VI
D. I, IV, and V
E. I, II, and III
Answer: D
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Your biology professor takes the class on a field trip to a local lake. You spend an hour studying the lake and writing down all observations. You hypothesize that the lake is oligotrophic. Which observations would support this hypothesis? Check all that apply.
_____ The shoreline is mostly rock and sand with very little vegetative matter. _____ The lake has extensive aquatic plant beds. _____ The lake has little planktonic growth. _____ The bottom of the lake is easily visible. _____ An oxygen probe reveals low oxygen content in the water. 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 eutrophic vs. oligotrophic lakes? 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?
The earliest nucleic acid was probably a simple DNA molecule
Indicate whether the statement is true or false.
An uncharged atom of nitrogen (atomic number = 7) has __________.
a. seven protons and seven neutrons b. seven neutrons c. seven valence electrons d. seven protons and seven electrons e. seven neutrons and seven electrons
Which of the following chemicals is a disinfectant for soft contact lenses?
A. glutaraldehyde B. hydrogen peroxide C. hexachlorophene D. hypochorites E. alcohol