How many total amino acids are there to build all the different proteins in organisms?

There is one amino acid for each protein and the amount of amino acids depends on where your start and end codons are. If you know where your start and end codons are, count 3 letters, (i.e. AGC), then move to the next three. Start from the start codon and for every three letters, there is an amino acid.

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parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.