No, some such as worms have no limbs whereas insects have six and octopuses have eight.
Yes, invertebrates do have limbs.
Yes, they have four legs (so they have four 'limbs').
ARTHROPOD Crustaceans Also, insects, arachnids, etc. Generally, invertebrates with jointed limbs and a hard external skeleton are called arthropods. See http://en.wikipedia.org/wiki/Arthropod
Invertebrates have different structures and tissue organizations. They do not have four limbs, they do not have eyes with true lenses often, they usually don't have a skeleton like ours, their organ systems all work differently from ours.
They are vertebrates - they have a complete skeleton including spine, skull and limbs.
Yes, lizards typically have four limbs.
The name of a vertebrate with four limbs is a tetrapod (tetra meaning four and pod meaning foot).
Four.
yes
Four.
A healthy lion has four (4) limbs or legs.
For certain all higher animals do. It also depends on your meaning of limbs. But, all Chordata have a backbone. Only Vertebrate that does not have limbs, if your are defining limbs to be legs and arms, are the fish. The term use to describe 4 limbed animals is tetrapod.