Answer:
it's false , they can travel through vacuum too.
Explanation:
electromagnetic EM waves can travel through solids, liquid , gases, vacuum.
these waves can travel through any medium, for example visible light.
hence doesn't need any material media to propagate
The answer to your question is Sclerenchyma cells have thick lignified secondary walls. Answer: Sclerenchyma
The answer is: contribute to ozone depletion.
CFC (chlorofluorocarbon), including freon, is used as the aerosol propellant. <span>An aerosol is a suspension in the gaseous form of solid or liquid particles. when these compounds reach the stratosphere, UV light affects them and they release chlorine atoms. Chlorine atoms are capable of breaking down ozone molecules. With fewer ozone molecules, the ozone layer becomes thinner and harmful UV light passes through it. </span>
Answer:
DNA is often compared to a ladder becaause of its structure. The nucleotides form hydrogen bonds in a certain sequence, forming a "rung" of the ladder. The backbones of DNA are formed by alternating phosphates and sugar residues. Each nucleotide side attatches to 1 of the 2 backbones, creating a ladder shape.
The answer to this question is mutation.
