Answer:
There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.
Explanation:
mark me as brainliest
Chordates have a backbone...humans, bony fish, snakes, birds, frogs, all mammals.
Because unless you move your not going anywhere
C. the periodic rise and fall of the ocean surface
