in the event they lose one?
No, some such as worms have no limbs whereas insects have six and octopuses have eight.
Three pairs for insects, four for arachnids, five for crustaceans and many for centi/millipedes.
An arthropod is an invertebrate with an exoskeleton. They have joined bodies and limbs. Insects are arthropods, as are many crustaceans.
No to all three questions.
A healthy lion has four (4) limbs or legs.
Trees that have limbs cut can get fungus or insects. Consult an arborist.
Yes, lizards typically have four limbs.
A bird has 4 limbs: its arms are wings and its legs are its legs.
6-legged insects
humans have 4 limbs,
Al insects have 6 legs. Most have 4 wings. This is not enough information for an identification.
Cetaceans have only vestigial hind limbs.