Reproductive Strategies Flashcards
1
Q
What part of the amniotic egg allows gaseous exchange from placenta in mammals?
A
Chorion
2
Q
What part of the amniotic egg prevents dehydration and mechanical injury?
A
Amnion
3
Q
What part of the amniotic egg is a reservoir for nitrogenous waste?
A
Allantois
4
Q
What part of the amniotic egg provides nutrition for embryos?
A
Yolk sac
5
Q
Which part of the amniotic egg provides protection and prevents dehydration?
A
Shell
6
Q
Advantages of vivipary:
A
- reduced egg numbers
- nourishment and protection
- provides parental care
7
Q
Advantages of ovovivipary:
A
- large amount of yolk
- protection from predators
- young born fully developed
8
Q
Advantages of ovipary:
A
- aquatic: many eggs with small amounts of yolk(less energy)
- land: very few eggs(more yolk, more protection, parental care)
9
Q
Disadvantages of ovipary:
A
- aquatic: often very little parental care
- land: susceptible to predators
10
Q
Disadvantages of internal fertilisation:
A
- finding a mate
- fewer reproduction opportunities
- longer gestation
11
Q
Disadvantage of external fertilisation
A
- wasteful number of eggs
- fertilisation not certain
12
Q
Advantages of internal fertilisation:
A
- fertilisation is more certain
- fewer gametes needed
- protective shell/yolk
13
Q
Advantages of external fertilisation
A
- large number of gametes to avoid predation
- courtship rituals bring gametes closer
14
Q
Ovovivipary:
A
- eggs are fertilised internally
- eggs are kept inside then hatched internally
15
Q
Vivipary:
A
- internal fertilisation
- eggs do not have shell
- born live
