What produces gene flow? ws
O mating between populations
O mutation
O geographical isolation
O speciation

O mutation

Explanation:

please mark this answer as brainliest

is called echinoderms

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.