PLEASE HELP FAST 30 POINTS
Which of the following correctly matches the first step of polymerase chain reaction (PCR) with its events?

a
Annealing - Taq polymerase extends the primers, synthesizing DNA
b
Evacuation- poly A segments fuse with primers to initiate sequencing
c
Denaturation - high temperature separates the DNA
d
Extension - reaction is cooled and primers bind to complementary sequences on template DNA.

Which statement best describes the nature of science? a. science discoveries using the latest technology are the most valuable. b. scientific theories and laws are based on beliefs and popular opinion. c. scientific ideas change over time as new information is discovered. d. science is superior to other fields such as art, philosophy, and music. i think its c

List two limitations of natural selection

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.