Hi, Do you have any questions about fossils? In the
following presentation you will be able to answer these questions
and learn how fossils are formed.
can many fossils be found? How are sedimentary rocks
formed? Sedimentary rocks are formed from sediments such as rock
particles, silt, and mud. Name some of the fossils found in
HSOffspring inherit their genetic traits that make them look like their parents, through genes contained in the chromosomes during the process of reproduction.All body cells of an organism have identical genetic information,yet are different in structure and function. The explanation for this variation in cellular structure, is that different parts of the genetic instructions are used in different cells and gene expression is influenced by the cell environment and past history.
Check the power point presentation to get more information.
Well,you ,I And other humans followed the same journey to be here in this planet and play our role as humans. from a single cell at fertilization to a multi cellular organism as baby at birth. follow the power point presentation to discover how you came to this world. don’t forget that some developed in a slightly different way.Can you tell how? well I will let you figure that by yourself.
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.
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
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.
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
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.
“>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?
<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?