Darwin’s Theory Of Natural Selection.

Topic Darwin’s Theory of natural selection There are a few theories that attempt to explain or show how organisms change  (evolve)  over time  .ee 1.The Branching Theory. 2.The Theory Of Spontaneous Generation.  3.  Use And Disuse. 4.The Theory Of Natural Selection. Darwin’s theory of natural selection proposed that nature(the environment) is a major contributing factor ofContinue reading “Darwin’s Theory Of Natural Selection.”

Fossils, An Evidence Of Evolution

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. How can we use fossils as n evidence of evolution? Types of fossils Where can many fossils be found? How are sedimentary rocks formed? Sedimentary rocks are formed fromContinue reading “Fossils, An Evidence Of Evolution”


Evolution is the change in species over time,also known as biological or organic evolution. 1.What do scientist learn from the study of organic evolution? 1.The study of evolution helps to , 1. Explain the differences in structure, function, and behavior among living things. 2.Explain the changes in characteristics in populations throughout time. 1.List the evidence that supportContinue reading “Evollution”

Inheritance of genetic traits

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 areContinue reading “Inheritance of genetic traits”

Steps Of The Reproductive Process In Humans

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 differentContinue reading “Steps Of The Reproductive Process In Humans”

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 inContinue reading “Types of fertilization”

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 ZygoteContinue reading “Embryonic 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

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) LetContinue reading “Meiotic cell division Meiosis”

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 neededContinue reading “Active Transport Vs Diffusion (Passive Transport)”