Which of these is necessary for only the FIRST step of PCR?

a) the four DNA nucleotides

b) DNA primers

c) original template DNA

d) DNA polymerase

e) All of these choices are correct.

Which type of mutation results in a base pair within a DNA sequence being replaced with a different pair?

The spring garden smelled like

Which is an example of one of the first plants to evole

Does oxygen gain or lose electrons to become stable

What's another name for the water cycle? A. evaporation cycle B. hydrological cycle C. condensation cycle D. hydrogen cycle

Fossil records suggest major changes in early vascular plants that favored the evolution of land plants. Which was one of these major changes? Select one of the options below as your answer: A. Development of fruit B. Development of seed C.

Many people in the developing world who depend on rice in their diet suffer from diseases related to deficiencies of

Why does biology have to be a subject

Differential reproduction of genotypes leads to evolution via what process? inbreeding natural selection genetic rescue genetic drift mutational load

Why is carbon essential to all known life on Earth?