Question
What is "internal fertilization" and how does it happen? What kind of animals use this method? List a few animals. give two advantages and two disadvantages.
What is it: when a sperm cell and an egg cell unite outside the bodies of the parents.
How does it happen: if a spermcell comes in contact with an egg cell of the same species, fertilization may occur.
Who uses it: it is commonly used amongst aquatic animals. Example, sea urchins and salmon.
2 advantages: very little energy is required to find a mate. Large numbers of offsrping are produced at one time.
2 disadvantages: millions of gametes are released but many won't survive. zygotes and embryos form outside of parents' bodies are unprotected and preyed upon.
How could I change any of this so that 9/10 year olds can understand?
Thank you very much!!
What is it: when a sperm cell and an egg cell unite outside the bodies of the parents.
How does it happen: if a spermcell comes in contact with an egg cell of the same species, fertilization may occur.
Who uses it: it is commonly used amongst aquatic animals. Example, sea urchins and salmon.
2 advantages: very little energy is required to find a mate. Large numbers of offsrping are produced at one time.
2 disadvantages: millions of gametes are released but many won't survive. zygotes and embryos form outside of parents' bodies are unprotected and preyed upon.
How could I change any of this so that 9/10 year olds can understand?
Thank you very much!!
Answers
SraJMcGin
Please see your prior post.
Sra (aka Mme)
Sra (aka Mme)
Ms. Sue
Please check your facts. Internal fertilization occurs inside the body of the female.