What is the best description of Cosmic Microwave Background Radiation?

Residual energy leftover form the origin of the universe.

Energy from the Sun measured in microwaves.

Evidence that galaxies are rapidly moving apart.

The chemical composition of Hydrogen and Helium.

PLEASEE HELPPP

Which of the following is a cause of a dna mutation? o a. the linking of amino acid subunits into a long chain o b. the transcription of dna into rna o c. an error in the repair of damaged dna d. the diffusion of molecules across the cell membrane submit

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes