1. Reproductive Strategies

2. Asexual Reproduction
Def: Repro not involving genetic exchange between organisms
No gametes involved
No genetic variety between generations
Examples: budding, binary fission, fragmentation

6. Asexual Reproduction Advantages Disadvantages
No need to find a mate (good for solitary animals)
Can make many babies fast (opportunistic)
Disadvantages
No variety, not very adaptable

7. Sexual Reproduction
Def: involves fusion of gametes to form offspring

8. Hermaphrodites Def: individuals can produce both eggs and sperm
Advantages
Each individual encountered is a potential mate
Twice as much reproductive potential
Disadvantage
Cost lots of energy to produce both eggs and sperm

10. Sequential Hermaphrodites
Reverses sex during lifetime
Ex. Whiptail lizards
Wrasse

14. Mechanisms of Reproduction
External fertilization: takes place in the environment
Environment must prevent gametes drying up and overheating
WATER
Timing must be perfect
Behaviorally or environmentally cued
Eggs and zygotes are not cared for (and good food)
Produce MANY

18. Mechanisms of Reproduction
Internal Fertilization: sperm deposited in or near female reproductive tract
Often produce fewer zygotes
Protected and cared for

20. Amniotic eggs Look up: what animals have them (3 animal classes)?
How are they an adaptation for life on land?
Make a labeled diagram, and include the purpose of each structure (p819)