Energy is commonly defined as "the capacity
to do work." This definition is
a. incorrect.
b. adequate in the physical sciences.
c. adequate in the biological sciences.
d. a clue to the actual properties of the
concept.
e. not accepted by most scientists
D
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Ciliated gills in clams, sharks continuously swimming with their mouths partly open, countercurrent flow of blood and water in fish gills, and the use of air sacs to effect unidirectional flow of air through bird lungs are all adaptations that optimize what factor in the formula for Fick’s Law of diffusion?
A. D B. A C. Dp D. d 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 diffusion? 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?
How could an embryonic stem cell be used to repair a severed spine?
A) Embryonic stem cells secrete proteins that repair all other cell types, including nerve cells. B) Embryonic stem cells can grow into any other cell type, including a nerve cell. C) Embryonic stem cells can cause any other cell type to multiply. D) Embryonic stem cells are primarily involved with neural growth and development.
Color changes in leaves Leaves of many plants change colors in the fall because
a) the cooler weather causes plants to produce more of the accessory photosynthetic pigments. b) chlorophyll in the leaves degrades with shorter days and cooler temperatures. c) the decrease in daylight hours causes the plant to produce more of the accessory photosynthetic pigments. d) plants produce more chlorophyll. e) All answers are correct.
For most atoms, when does the configuration of electrons make the atom unreactive?
a. when the atom has moved all of its electrons to its outermost shell b. When the atom has as many protons as neutrons c. When the atom achieves a zero net charge d. When the atom as 8 electrons in its outermost shell