Which are true of electromagnetic waves? Select all that apply. They have different wavelengths.
They have the same frequency.
They all travel at the same speed.
When they travel outside of a vacuum, their speeds increase.

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?

Long term exposure to waves can cause sunburns and skin cancer.

In the 1500s, an astronomer developed a new model of the universe. this model had the sun at the center of the universe, not earth. who was this astronomer?