Which of the following techniques is used by researchers to carry out dna replication in vitro?
northern blotting
dna fingerprinting
polymerase chain reaction

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii

The wind is to parities grasses because it them