Inner Reptile Flashcards
1
Q
Do humans have a yolk sac? Do they make yolk? How does this relate to your inner reptile?
A
- yes, they have a yolk sac
- there is no yolk inside, just a left over feature of our ancestors
2
Q
Mammals have hair, but reptiles have scales. In mammals, what might hair have been used for originally?
A
hair was originally used for warmth and sense organs
3
Q
Mammalian teeth are very different from reptilian teeth. What are the advantages and disadvantages of heterodont teeth?
A
- advantages: developed a precise bite
- disadvantages: we do not continuously grow new teeth to replace the old ones
4
Q
Skin organs evolved from folded skin, which is partly controlled by the EDA gene. What skin organs are impacted by a dysfunctional EDA gene?
A
sweat glands, finger tips/ nails, teeth, hair
5
Q
Reptiles have one middle ear bone, whereas mammals have three. From where did the other two bones come in mammals?
A
it is part of the jaw that moved up into placement of the ear
