Answer:
electromagnetic waves can travel in a vacuum
Explanation:
The answer is A. a gene is a form of a trait, and alleles make up genes
2. Dinosaurs appeared before mammals (a)
Answer:Twilight is the name given to the time ____, when the sky remains ... Air molecules selectively scatter visible light because ____. ... the electrons that orbit around the nucleus of atoms have a blue color ... loaded with particles, only the longest red wavelengths are able to penetrate the ... slightly lower than it appears the answer is b
Explanation:the answer is b