Natural colonization can happen in all of the following ways except
A. a flock of birds gets blown off course.
B. a bird eats a fruit on the mainland and defecates the seed on an island.
C. people plant new species on an island.
D. lowered sea levels connect two areas previously isolated.
E. birds pick up seeds on their feet while wading in mud and drop them elsewhere.
C. people plant new species on an island.
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The ________ cells in a multicelled organism will contain pairs of chromosomes which are not used for sexual reproduction. a. reproductive b. None of these choices
c. germ d. sex e. somatic
A snake that eats a small rabbit that feeds on grass is classified as a(n)
A) primary consumer. B) secondary consumer. C) autotroph. D) primary producer. E) tertiary consumer.
The common ancestor that produced the most evolutionary recent derived characters is
A. 12 B. 8 C. 9 D. 6
CO2 makes up about ________ percent of the atmosphere
A) 0.035 B) 35 C) 3.5 D) 37 E) 0.35