Which one of the following is the least likely reason that bipedalism evolved in hominoids?
A. requires less energy than walking with all four legs
B. allows better surveillance for predators
C. frees the hands for carrying food to be shared with others
D. increases access to food resources
E. frees the hands for tool-making
Answer: E
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Water tension in a transpiring plant
a. is exerted on a continuous column of water throughout the plant. b. is the result of the hydrogen bonding of water molecules. c. results in negative pressure in the xylem. d. exerts a pull on water molecules from leaves to roots. e. fits all of these descriptions
Which of the following is NOT a function of the respiratory system?
A) vocalization B) electrolyte balance of blood C) enhancing venous return D) heat loss E) acid-base balance of blood
A genetic cross between two individuals who are heterozygous for two traits of interest is called a(n) ________
Fill in the blank(s) with correct word
How is sexual reproduction different from asexual reproduction?
A. Sexual reproduction occurs with only a single parent. B. Asexual reproduction requires testes and ovaries. C. Sexual reproduction requires fertilization of an egg by a sperm. D. Asexual reproduction requires two kinds of cell division.