It proves that living organisms MUST come from other living organisms, an egg couldn't magically appear in a pile of chicken seed, a hen would have had to lay the egg first, just as a nucleoulus makes ribosomes so the cell can have proteins, the proteins don't just materialize within the organism.
D) Long chains of amino acids used for building, repair, and maintenance
Proteins are made up of amino acids, and they are used to create substances (like hair, nails, etc.)
Hope this helps!!
Secondary succession takes place in a grasslands and primary succession takes place in rocky desert.
Secondary succession also progresses faster.
