Asexual vs. Sexual

External vs. Internal Fertilization

Spores vs. Seeds in Plants

Egg Types

Reproductive Strategies

Asexual Sexual

More opportunities Less opportunities

Less energy needed More energy needed

More offspring Less offspring

No parental care Some parental care

Lower offspring survival

Higher offspring survival

Asexual vs. Sexual Reproduction

Asexual Reproduction

Sexual Fertilization

External(outside)

Internal(inside)

Needs a water environment

Doesn’t require a water environment

Eggs are unprotected Eggs are protected(uterus or shell)

Random/inaccurate fertilization

Specific/accurate fertilization

Large amounts of sperm/egg

Small amounts of sperm/egg

Typically aquatic animals(fish, amphibians)

Typically land animals(reptiles, birds,

mammals)

External vs. Internal Fertilization(uniting of sperm and egg)

Spores Seeds

Microscopic size Large and visible

Simple single-celled structure

Complex multi-celled structure

Produced by leaves Produced by flowers/fruit

Needs water to germinate

Can germinate anywhere

Spread by wind Spread by animals, wind, & water

Produced in large amounts

Produced in lesser amounts

Spores vs. Seeds in Plants

Spores vs. Seeds in Plants

Spores

Types of Seeds

Egg types of Vertebrate Animals

Fish & Amphibian Eggs-no shell-embryonic sac provides nutrients-needs water to survive

Amniotic Egg-yolk sac provides nutrients-shell protects embryo-Reptiles(soft) & Birds(hard)- survives dry land

Egg types of Vertebrate Animals

Placental Mammals-no shell-placenta provides nutrients-internal development