reproduction
what is sexual reproduction
The genetic material from two different cells produce an offspring
A large majority of animals
use internal fertilization
After fertilization, the zygote begins to develop into an
embryo
what is external development
Development that takes place outside the body occurs in an egg
what does gestation period mean
The length of time between the fertilization of an egg cell and birth of an animal
the majority of animals reproduce
sexually
what does zygote mean
The new cell that is formed after an egg cell is fertilized
what does mitosis mean
cellular division
What does the egg need to have that most animals going through internal development already have?
A way for the embryo to be nourished
A yolk provides the embryo with food
not every animal goes through the same type of metamorphosis, true or false?
true
If they do not reproduce sexually, they reproduce
asexually
the zygote then develops into a new ____over time
organism
A developing embryo needs two things
nourishment and protection
Eggs typically have a covering that helps keep it refreshed_____
and protected from predators
what does metamorphosis mean
A developmental process where the form of the body changes as an animal goes from an egg to an adult
this does not require a __and a _____ joining
sperm/egg cell
what does fertilization mean
The joining of an egg cell with a sperm cell
this occurs either ____or _____
inside the body or outside the body
what is internal development
Embryos that develop inside of the animal
what is phase two
Phase 2: Larva: pre-adult phase where newly hatched animal grows and develops
genetic material is also known as?
DNA
what does internal fertilization mean
Fertilization that occurs inside the body of an animal
Two daughter cells are created from
one parent cell
Occurs for almost all mammals except ______and some____
platypi and some anteaters
what is the 3 phase of metamorphosis
Phase 3: Pupa: Inactive phase where larva transforms into adult