Categories
LIVING THINGS

Types of fertilization


Fertilization is an essential process in sexual reproduction. It fuses the gametes thus restoring  the chromosomes number specific for the species.there are two types of fertilization,external and internal.

A quick warm up

1- Define fertilization.
The fusion or the union of sperm nucleus and an egg nucleus.

2- What is the importance of fertilization in sexual reproduction.?
It restores the chromosome # characteristic of the species.

Categories
GENETICS LIVING THINGS REPRODUCTION AND DEVELOPMENT

Embryonic Development


We Will follow the development of a fertilized egg from a zygote  to a baby. It’s fascinating to see how a single cell develops  and grows into a complete baby.

check your vocabulary through these introductory questions and follow the power point presentation to check your understanding of the process of development


Embryonic Development

How Does A Zygote develop into An Embryo?

Define the term embryonic development.

The changes from a zygote to a baby.

What will happen to the zygote after fertilization?

It undergoes the process of cleavage.

What is the end result of cleavage?

A  ball of cells called a morula is formed,then changed into a blastula.

 

Categories
LIVING THINGS REPRODUCTION AND DEVELOPMENT

Sexual Reproduction


Sexual reproduction:
Involves two parents.
Results in offspring that are different from either parent.
The genetic variation is due to recombination of chromosomes.
This process involves the fusion of two gametes nuclei (egg& sperm).
Fusion of the sex cell nuclei occurs during fertilization forming the zygote.

Check the details

Categories
GENETICS LIVING THINGS REPRODUCTION AND DEVELOPMENT

Meiotic cell division Meiosis


Facts about meiosis.

Meiosis involves two cell division.
It produces cells that are different from the parent cell. Each cell has .one-half the number of chromosomes as the parent cell.
Meiosis takes place during sexual reproduction, producing sex cells ( eggs & sperms ).
It takes place in the sex organs (ovaries & testes)

Let us explore how meiosis  happens.

Check the power point presentation.

Categories
LIVING THINGS

Active Transport Vs Diffusion (Passive Transport)


<a href="http://

https://www.fagcebook.com/Benguennak/posts/2077214812296410

“>Power point presentation All organisms must  absorb, and circulate nutrients through out the body,   All cells must  obtain the needed nutrients, to maintain homeostasis.Well, how does this transport of materials occur?

 

https://www.fagcebook.com/Benguennak/posts/2077214812296410


 <a href="http://PowerAll organisms must  absorb, and circulate nutrients through out the body,   All cells must  obtain the needed nutrients, to maintain homeostasis.Well, how does this transport of materials occur?  

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