Question

1. how many organisms on the cladogram have lungs?
2. list a characteristic that salamanders and mice share.
3. name 2 organisms that have fur and mammary glands.
4. which organism does not have a jaw?
5. list a characteristic that lizards and pigeons both have.
6. which pair of organisms are most closely related (circle one).

hagfish and chimp, salamander and mouse, perch and lizard, or perch and salamander

Explanation:

Step1: Count lung - having organisms

Count the organisms on the cladogram that are above the "Lungs" label. Salamander, Lizard, Pigeon, Mouse, Chimp have lungs. So there are 5.

Step2: Find shared characteristic of salamander and mouse

Both salamander and mouse are vertebrates.

Step3: Name organisms with fur and mammary glands

Mouse and Chimp have fur and mammary glands.

Step4: Identify organism without jaw

Hagfish does not have a jaw.

Step5: Find shared characteristic of lizard and pigeon

Both lizard and pigeon have claws or nails.

Step6: Determine most closely - related pair

Perch and Salamander are most closely related as they share a more recent common ancestor compared to the other pairs based on the cladogram structure.

Answer:

1. 5
2. Vertebrates
3. Mouse, Chimp
4. Hagfish
5. Claws or nails
6. Perch and Salamander