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

Question

Responses

notochord
notochord

placenta
placenta

mammary glands
mammary glands

four limbs
four limbs
Question 2
Which animals have the closest evolutionary relationship, as shown by the cladogram? (1 point)
Responses

humans and wallabies
humans and wallabies

humans and lizards
humans and lizards

humans and trout
humans and trout

humans and lampreys
humans and lampreys
Question 3
A valid conclusion from this cladogram is that(1 point)
Responses

humans and lampreys share a common ancestor.
humans and lampreys share a common ancestor.

salamanders, trout, and lampreys all have a backbone.
salamanders, trout, and lampreys all have a backbone.

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.

Answer 1

Question 1: The characteristic shared by humans, wallabies, and trout is:

• notochord

All these animals are part of the phylum Chordata, which is defined by the presence of a notochord at some stage in their development.

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Question 2: The animals with the closest evolutionary relationship, as shown by the cladogram, are:

• humans and wallabies

Humans (a primate) and wallabies (a marsupial) are both mammals and share a more recent common ancestor compared to the other listed pairs.

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Question 3: A valid conclusion from the cladogram is that:

• salamanders, trout, and lampreys all have a backbone.

This statement is true because lampreys, trout, and salamanders all fall under the vertebrate group, which is characterized by having a backbone.

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Feel free to ask for more information or clarification on any of the answers!