Question

1)the notochord is an evolutionary convergent trait

true or false

2) Coelacanths have lungs

true or false

3) if your eyeball is too short, you focus light behind the retina

true or false

4) Modern birds are the descendants of the ornithischians linage of dinosaurs

true or false

5)Smooth muscles are voluntary muscles

true or false

6)the function of the zone pellucida is to prevent polyspermy

true or false

7)the notochord is derived from mesoderm

true or false

8) the human spinal column contains 18 vertebrae

true or false

9) the group Osteichthyes is united by the presence of endochondral bone

true or false

10) the four-chambered hearts of birds and mammals evolved by convergent evolution

true or false

11)current deextinction research is focused mainly on recovering extinct invertebrates

true or false

12)cats are native to northern Europe

true or false

Answer 1

1. True. The notochords in chordates are like the stomochords in hemichordates.

2. True. Coelecanths have lungs but are not able to breathe

3. True. If the eyeball is too short, the “point of light” focuses on a location behind the retina, instead of on the correct area of the retina, known as the fovea.

4. False. Birds are more closely related to Saurischia which includes two major groups- The Sauropoda which were herbivores and The Theropoda which were carnivores. Modern birds have common ancestors on the theropod lineage.

5. False. Smooth muscles are involuntary.

6. True.When a sperm penetrates ovum, it induces changes in the membrane that make the zona pellucida layer impenetrable to additional sperms. Thus, prevents polyspermy.

7. True. Notochord is composed of cells derived from the mesoderm.

8. False. The vertebral column usually consists of 33 vertebrae.

9. True. Osteichthyans have endochondral bones around the brain and in the girdles for fins or limbs.

10. True. The four-chambered hearts of birds and mammals evolved by convergent evolution.

11. False. Current deextinction research is focused mainly on recovering extinct vertebrates like wooly mammoth, dodo etc

12. True.The European wildcat, Iberian lynx, and Eurasian lynx are the three wild cats found in Europe. Others have become extinct.