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Question

Feature
Use the cladogram below to answer the questions that follow

Question 1
Which characteristic is shared by humans, wallabies, and trout? (1 point)
Responses

notochord
notochord

placenta
placenta

four limbs
four limbs

mammary glands

Answer 1

The characteristic that is shared by humans, wallabies, and trout is the notochord. All of these organisms, being part of the chordate phylum, possess a notochord at some stage of their development.

• Humans and wallabies are mammals and share the placenta and mammary glands, but trout, being fish, do not.
• Only humans and wallabies have four limbs, while trout have fins.

So the correct answer is notochord.