Chimpanzees and gorillas share the trait of knuckle-walking, which humans do not generally have. Why do most scientists NOT classify chimpanzees and gorillas as each other's closest relatives?
A) The majority of genetic evidence places chimpanzees closest to humans, not to gorillas.
B) Fossil evidence suggests that knuckle-walking was present in ape ancestors and is not a uniquely derived trait for chimpanzees and gorillas.
C) Chimpanzees and humans share more unique features in common than either share with gorillas.
D) Fossil apes that are thought to be closest to humans show adaptations for knuckle-walking, implying that humans have secondarily lost the trait.
E) All of the above.
E
You might also like to view...
Which of the following are important features of carbon and the diversity of organic molecules?
A. Carbon can form up to 4 covalent bonds with other elements. B. Carbon bonds may occur in multiple different configurations such as linear, ringlike, and highly branched. C. Carbon can form both polar and nonpolar covalent bonds with various elements. D. Carbon bonds are stable at the range of temperatures associated with life. E. All the choices are correct.
Pathogens are engulfed by ____________________ during the first stage of an inflammatory response and by ____________________ during the last stage of the response
Fill in the blank(s) with correct word
Which part of your brain processes the information in this question and, you hope, retrieves the information necessary to answer it?
A) cerebellum B) cerebral cortex C) hypothalamus D) pons E) midbrain
Which of the following statements is NOT true?
a. A lipid bilayer is characteristic of all membranes. b. Cellular organelles are associated with membranes. c. In a plasma membrane, a hydrophilic portion is oriented to the outside of the cell. d. Lipid molecules make the cell membrane relatively impermeable to water-soluble substances. e. Even by using extremely high magnification, an electron microscope cannot reveal the substructure of cell membranes.