Which of the following happens first?
a)introns are edited out of the premature dna.
b)rna ploymerase reaches a terminator region.
c)nucleotides are covalently linked together.
d) rna polymerase binds to a promoter region of dna.

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

Which is the function of the hypothalamus in thermoregulation? answers: -sensor -effector -stimulus -intergrating center it's either a or c i believe

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