Use the cladogram below to answer the questions that follow
A valid conclusion from this cladogram is that(1 point)
Responses
four limbs appeared in vertebrate evolution before the notochord appeared.
four limbs appeared in vertebrate evolution before the notochord appeared.
mammary glands appeared in vertebrate evolution after the placenta appeared.
mammary glands appeared in vertebrate evolution after the placenta appeared.
humans and lampreys share a common ancestor.
humans and lampreys share a common ancestor.
salamanders, trout, and lampreys all have a backbone.