Which statement describes a step in dna replication?

the double helix unwinds and each strand forms a template for a new strand.

the paired bases release many types of proteins.

the dna is cut into pieces using polymerase enzymes.

new bases are built by the original strands.

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.