Has Tass Anything
8 It forms part of plant protein and influences the function of
chlorophyll

Look at the picture below . what does this picture represent ?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled