Disruptive selection tends to _____ (select all that apply)
a. eliminate extreme forms of a trait
b. favor extreme forms of a trait
c. eliminate intermediate forms of a trait
d. favor intermediate forms of a trait
e. shift allele frequencies in one direction
B, C
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Which of these is an example of hybridization?
a. breeding beagles and pugs to produce puggles b. breeding Hereford and Aberdeen Angus cattle to produce Black Baldy cattle c. breeding African Servals with domestic cats to produce Savannah cats d. breeding American Saddlebred and Arabian horses to produce National Show Horses
During the 1800's and earlier, most individuals
thought the Earth was approximately
a. 6 billion years old. b. 600 million years old. c. 600,000 years old. d. 60,000 years old. e. 6,000 years old
Which of the following organisms has the simplest digestive system?
a. earthworm b. jellyfish c. grasshopper d. clam e. more than one of these organisms has the simplest digestive system
A flower that has sepals, petals, and stamens, but lacks carpels, is known as:
a. complete and perfect. b. complete and imperfect. c. incomplete and perfect. d. incomplete and imperfect. e. almost complete and almost perfect.