Transcript Reproduction

Lesson 10
What is reproduction?
Everywhere you look, you see
living things. They come in all
shapes and sizes.
Some are really big, like an
elephant
or giant trees
Others are really small like ants
fleas
blades of grass
Bacteria are even smaller……..
much smaller!
Plant or animal, large or small, all
living things reproduce their own
kind.
Reproduction is the life process
by which organisms produce new
organisms.
In other words, making babies.
Having a baby is reproduction.
So is planting a seed to grow a
corn plant.
The new organism is called an
offspring.
My sister Lynn is the
offspring of
my parents.
Most organisms create new life
through the process of sexual
reproduction.
Sexual reproduction requires
two parents.
One female
One male
In sexual reproduction, cells from
the two parents join to form a
new organism.
Male organisms make male sex
cells, sperm.
Female organisms make female
sex cells, eggs.
The new organism grows from the
joined cells. The new organism is
not exactly like either of its
parents. Instead, the new
organism has some features of
both parents.
Think about yourself. How do you
look like Dad? How do you look
like Mom?
Many plants reproduce sexually!
Did you know that some plants are
female and some are male?
During reproduction, the male sex
cell, pollen, unites with the female
sex cell, an egg.
From this you get a seed.
Some organisms reproduce
without any sex cells!
This is called asexual
reproduction. Only ONE parent
is needed.
In asexual reproduction, the
offspring look exactly like the
parent.
Bacteria reproduces asexually. A
bacterium grows to full size then
splits in half. Now there are two
bacterium.
Some plants also reproduce
asexually. For example,
strawberry plants.
The strawberry plants grow
runners which root in the ground
and grow new plants.