Reproduction
What is sexual Reproduction?
The generic material from two different cells produce an offspring.
What is development?
A Zygote begins to develop into an embryo.
What is fertilization?
The joining of an egg cell with a sperm cell.
How many embryos are in per egg?
One.
What is internal fertilization?
Fertilization that occurs inside of the body of the animal.
Sexual Reproduction needs what cell from the female?
Egg cell.
What is Mitosis?
Cellular division, two daughter cells are created from one parent cell, each daughter cells gets DNA from the parent cells.
What is an Embryo?
An Embryo is the developing offspring.
What provides the embryo with food?
A yolk.
What is internal development?
An Embyro getting nourishment from organ tissues of the mother.
Sexual Reproduction needs what cell from the male?
Sperm cell.
What two things does an embryo need?
Protection and nourishment.
What is a Zygote?
The new cell that is formed after an egg cell is fertilized.
What does the covering of the egg do?
It helps protect the egg from predators.
Why don't the embyro's get nourishment from the mothers?
Because they get it from a yolk.
If animals do not reproduce sexually they reproduce what?
Asexually.
Does mitosis occur constantly throughout the lifespan?
Yes.
Genetic material is known as what?
DNA.
1) Eggs laid by reptiles have what kind of covering?
2) Eggs laid by underwater often have what kind of covering?
3) Eggs laid by birds have what kind of covering?
1) Tough, leathery covering.
2) Jelly-like covering.
3) Harder covering (Shell).
What are some animals that use internal fertilization?
Earthworms, spiders, imsects, reptiles, birds, and mammels.
Animals that reproduce asexually do not require?
A sperm cell and egg cell joining.
What do stem cells do?
They are used to make new blood.
Where does half of the DNA come from?
Half from the egg, and half from the sperm cell.
What is one animal that is commonly known for external fertilization? *Hint* This animal lives in the ocean, but breaths air.
A Sea Turtle lays it's eggs in the sand and leaves them there, Sea Turtle's usually lay multiply eggs Incase any baby turtles are stolen by birds or bigger predators.
What are the benefits of internal fertilization?
Ensures that an embryo is protected and nourished.