Crystal is the main difference between intrusive and extrusive igneous rock.

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

How many moles are in 43.9 l of oxygen