embreology

Question 1

3 types of embreo protection and properties (3)

Answer 1

1. vivipary protection
   - embreo within body
   - nutrients from body ( placenta)
2. ovipary protection
   - fertilized egg externaly released
   - embreyos develope externaly in egg
3. ovivipary protection
   - incubates egg within the body
   - egg feeds embreo within body

Question 2

altrical organisms (2) vs precocial organisms (2)

Answer 2

1. altrical
   - born/hattched under developed
   -energy goes into parenta; care
2. precocial
   - born fully developed
   - energy goes into parental development

Question 3

within the amniotic egg whats the uses for:
1. cherion
2. albumen
3. yolk sac
4. amnion
5. allontois
6. shell

Answer 3

1. cherion - gascious exchange
2. allbumen - water and mechanical
   support
3. amnion - where embreo developes
4. allontois - contains water
5. shell - protects and porus