The Caribbean islands are home to more than 150 species of anole lizards. How might so many species have evolved from a single common ancestor?
A. Lizards evolve more rapidly than other species.
B. Mutation is more common on islands.
C. The ancestor had a prezygotic barrier to reproduction.
D. The species on an island went through allopatric speciation.
E. They adapted to fill unoccupied niches.
E. They adapted to fill unoccupied niches.
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The normal flora that inhabit our body surfaces ____
a. are harmful b. competitively exclude more harmful species c. produce vitamin C d. become even more beneficial if they invade tissues e. participate in phagocytosis of pathogens
Which of the following is composed of a 1:2:1 ratio
of carbon to hydrogen to oxygen? a. carbohydrate b. protein c. lipid d. nucleic acid e. steroid
Which individual associated with the beginning of
the Human Genome Project was concerned with its ethical and social implications? a. Walter Gilbert b. James Watson c. Francis Crick d. Francis Collins e. Craig Venter
Four of the five answers listed below are internal parts of the same organ. Select the exception
a. distal tubule b. loop of Henle c. ureter d. proximal tubule e. Bowman's capsule