Questions

Group 1 metals are also called as alkali metals with reactive in nature and low melting points. They are soft and produce hydrogen and alkaline metal hydroxide solution when they react with water.

Color blindness primarily affects males as the the genes responsible for the most common, inherited color blindness are on the X chromosome, hence, primarily affects males.

Pollen is a male plant gamete. When microspores produced after meiosis process on microsporangia of male gametophyte undergo mitosis and forms pollen grains.

In the given options, all are the benfits of ozone. But, the main benefit of ozone is absorbing ultraviolet radiation from the Sun.