Which of the following enabled Homo sapiens to develop complex cultures unlike other members of the Homo genus?
A. the ability to walk upright
B. the development of agriculture
C. the ability to migrate out of Africa
D. changes in skin color
E. the ability to use stone tools
Answer: B. the development of agriculture
You might also like to view...
What type of procedure is appropriate to isolate revertants from a population of threonine auxotrophic cells?
A. Grow the auxotrophic cells on and agar plate with threonine; any colonies that form are presumed revertant. B. Grow the auxotrophic cells on an agar plate without threonine; any colonies that form are presumed revertant. C. Threonine auxotrophic revertants could not be isolated on any type of media. D. Grow the auxotrophic cells in broth with threonine; if the broth becomes cloudy, revertants are presumed present.
A somatic cell divides to form two genetically identical daughter cells during mitosis. Prior to mitosis
occurring, which of the following must occur?
a. The cell must replicate its DNA. b. The cell must first be fertilized. c. The nucleus must divide. d. Chromatids must be separated. e. The nuclear envelope must disintegrate.
In the figure, the decrease of herbs (grasses) and increase in mosses would suggest that the climate in Siberia has become in the past 10,000 years.
A. drier B. wetter C. hotter D. more windy
Which of the following proteins waterproof
skin?
a. collagen b. elastin c. keratin d. albumin e. myosin