politics tbfh but this answer has to be 20 characters sooooooooooooo
Answer:
C. 275 nm
Explanation:
At 275 nm of ultraviolet wavelengths causes mutation in a skin cell because at 275 nm of wavelength, maximum DNA Copying Errors occur in the cells that leads to mutation in the cell. A mutation is a kind of change that occurs in the DNA, due to two reasons, due to mistakes that is occur when the DNA is copied or as the result of environmental factors such as ultraviolet radiations.
Answer:
Tricuspid valve
Explanation:
The tricuspid valve helps push blood only from the right atrium into the right ventricle
