Semi-conservative replication of dna refers to
the idea that (3.3)
a. dna molecules need to unwind before
replication begins
b. each new dna molecule contains two new
single rna strands
c. two strands of dna molecules run in
opposite directions
d. each half of the original dna molecule is
joined with a new complimentary strand

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.