Assertion-ozone layer protects us from the infrared rays of the sun. Reason-infrared rays causes cancer.

i) A and R are true, r is correct explanation
ii)A is and R are trye, r is not correct explanation
ii) A is true, R is false
iv)A is false, R is true

Ifound this information on google “yes. they have a mouth and brain at one end and an anus at the opposite end. what characteristics distinguish an annelid from other worms? annelids have segmented bodies and a coelem which is a tube filled with fluid and contains most of the organs.“ i hope it you

You should never redesign your experiment. try and see what in your experiment you made a mistake on or try and test your experimemt with somebody else. see if they get the right results.