This is due in 4 hours can someone please help? There is a set of four questions but I will only like to know 1-3. Thank you.

What is a codon and where is it found

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.

Plz ! what does it mean for an allele to be dominant?