Eggs

Question 1

Difference between bird egg and reptile egg

Answer 1

bird - twister, lots of albumen, air space, hard shell

Reptile - no twister, little albumen, no air space, rubbery shell

Question 2

Why do reptile have rubbery shell?

Answer 2

Reptile shells are rubbery shell bc they contain little albumen and to absorb water from environment

Question 3

Function of yolk sac?

Answer 3

provide nutrition for embryo

Question 4

Albumen function

Answer 4

supply embryo w/ moisture and nutrients + absorbs shock

Question 5

Twisters function?

Answer 5

turn yolk so embryo remains on top closer to mother’s warm body

Question 6

How do bird vs reptile incubate their eggs

Answer 6

bird - lay on them
Reptile - cover their eggs with sand instead

Question 7

How do the eggs get warmth for bird vs reptile?

Answer 7

bird - twisters turn yolk so embryo remains on top closer to the mother’s warm body

reptile - eggs rely on sun to provide warmth

Question 8

How do hard eggshell absorb oxygen?

Answer 8

shell has pores that allow air to reach embryo

-shell membrane with blood that absorbs oxygen to carry to embryo

-air space

Question 9

Which reptile’s egg is the closest to the bird’s egg

Answer 9

crocodile

Question 10

Which reptile has the least albumen? Most?

Answer 10

Least - snakes or lizard’s egg
Most - turtle’s egg + crocodile’s egg

Question 11

4 extra embryonic membranes during embryonic life? and their functions

Answer 11

Yolk sac -provide nutrition for embryo

Amnion - protects embryo

Chorion - helps gas exchange
between oxygen & carbon dioxide

Allantois - stores nitrogenous wastes and helps respiration

Question 12

Shell function

Answer 12

protect egg and internal structure