Responses
mammary glands appeared in vertebrate evolution after the placenta appeared.
mammary glands appeared in vertebrate evolution after the placenta appeared.
salamanders, trout, and lampreys all have a backbone.
salamanders, trout, and lampreys all have a backbone.
humans and lampreys share a common ancestor.
humans and lampreys share a common ancestor.
four limbs appeared in vertebrate evolution before the notochord appeared.
1 answer
The valid conclusion from the cladogram is: humans and lampreys share a common ancestor.
This conclusion is based on the relationships depicted in cladograms, where closer branches indicate a more recent common ancestor. The other statements either contradict evolutionary relationships (like the timing of mammary glands and placenta) or make incorrect claims (like the timing of the appearance of four limbs and the notochord).
