Before Darwin could conceive of the idea of "descent with modification," he first had to accept
A. that organisms could inherit acquired characteristics.
B. the idea of catastrophism.
C. that the size of human populations is limited only by the quantity of resources.
D. the earth was very old.
Answer: D
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An ________ of a nerve cell is the temporary depolarization and repolarization of the cell membrane.
Fill in the blank(s) with the appropriate word(s).
The vestibular canal contains ____, while the cochlear duct contains ____
a. endolymph; perilymph b. tympanic membrane; organ of Corti c. organ of Corti; endolymph d. perilymph; endolymph e. scala media; endolymph
Chromosomes contain large amounts of interacting proteins known as
a. pentanes. b. hexosamines. c. histones. d. protein hormones. e. histamines.
Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers from 92-100. Which of the following can be true?
A) Molybdenum atoms can have between 50 and 58 neutrons. B) Molybdenum atoms can have between 50 and 58 protons. C) Molybdenum atoms can have between 50 and 58 electrons. D) Isotopes of molybdenum have different numbers of electrons.