The objective is to aid revision and provide notes. About 2 mm of a root tip of onion bulb is cut off and placed on a microscope slide. 4.1.1 THE NECESSITY FOR ORGANISMS TO REPRODUCE . Classification is based on the study of external characteristics of organisms. Example lifting heavy loads, Taking any medicine not prescribed by the doctor, Taking drugs such as alcohol, cigarettes which could be detrimental to the unborn baby, It contains antibodies that are much needed to the child, In case the mother has no health problems such milk is free from contamination, Mother’s milk also contains much proteins and vitamins which are very important for the child’s growth, Mother’s milk is said to contain some chemicals which help in development of the nervous system of the child, To ensure frequent medical check up for both maternal and child, Avoid sharing sharp objects like razor blades, Counseling in order to help them deal with their feelings of loss and grief, To avoid discrimination for people living with HIV/AIDS, Ensure the use of polite language when providing care to them, Wearing of gloves when cleaning their bodies and clothes. The Study of Biology; Scientific Investigation; 02 Cell Structure. Further development of nervous system, formation of sensory organs. Nandi flame, Jacaranda Sonchus, cotton seed, Tecoma. A detailed account of what happens after fertilisation is given below: Describe the male and female reproductive systems. Without a mechanism for reproduction, life would come to an end. Reproduction, process by which organisms replicate themselves. STUDY. Reproduction may be SEXUAL or ASEXUAL. MBEYA DISTRICT FORM THREE JOINT ANNUAL EXAMINATION, FORM ONE ENGLISH STUDY NOTES ALL TOPICS (TOPIC 1-16), PAST PAPERS FOR MOCK EXAMINATION TANZANIA (TAMONGSCO, TAHOSA ETC.). Biology Bookkeeping Chemistry Civics Commerce English Geography History Information and Computer Studies Kiswahili Literature Mathematics Physics ... Form 3: Form 4: Extracurricular Subjects: Cancel. Save my name, email, and website in this browser for the next time I comment. These gametes fuse to form a new cell called zygote, which grows and develops into a new individual. When the pollen tube penetrates the ovule disintegrates and the pollen tube bursts open leaving a clear way for the male nuclei. The offspring are identical to the parent. Sexual reproduction is the combination of (usually haploid, or having a single set of unpaired chromosomes) reproductive cells from two individuals to form a third (usually diploid, or having a pair of each type of chromosome) unique offspring. This notes covers the following topics: The Plant Cell and the Cell Cycle, The Organization of the Plant Body: Cells, Tissues, and Meristems, The Shoot System: The Stem and the Form and Structure of Leaves,The Root System, Concepts of Metabolism, Respiration, Photosynthesis, Absorption and Transport systems, Life Cycles: Meiosis and the Alternation of Generations, The Flower and Sexual … Smoking and health hazards Activities Experiment : Demonstration, The effect of Smoking Chapter 7 Man and microorganisms 1. It is very important that a couple gets only a number of children they can afford and care for. In the nucleus are a number of thread-like structures called chromosomes, which occur in pairs known as homologous chromosomes. Save my name, email, and website in this browser for the next time I comment. A fruit that is a capsule e.g. 1800-212-7858 / 9372462318. Eggs are covered by slippery jelly-like substance which provides protection. A taproot is the main root that arises from a radical. Oxygen from the maternal blood diffuses into the foetal blood while carbon (IV) oxide from foetal blood diffuse into maternal blood. The placenta allows maternal antibodies to pass into the foetus, providing the foetus with immunity. If fertilisation takes place, the level of progesterone increases and thus inhibits FSH from stimulating the maturation of another Graafian follicle. Homologous chromosomes lie side by side in the process of synapsis forming pairs called bivalents. Parents and teachers strictly supervising teenagers at home and school, respectively. This ensures that sperms are maintained at a temperature lower than that of the main body. Its offspring matures faster than sexually reproduced organisms, It does not depend on processes of pollination, seed or fruit dispersal, Asexually reproducing organisms are at a great risk to perish or get destructed when environmental conditions are unfavorable, Competition for resources such as food and shelter may occur due to large number of organisms being produced, The nucleus disappears and the centrioles if present migrate to the poles, Chromosomes condenses and the spindle is formed, Chromosomes contract, thickening, shortening and become more visible, Homologous chromosomes come together (synapses) forming a bivalent, Chromatids cross over by chiasmata which results into exchange of genetic materials, Bivalent homologous chromosomes moves to the equator of the spindle, The two homologous chromosomes part company and migrate to opposite poles of the spindle. A nuclear membrane forms around each set of chromosome. Add to cart. Sexual Reproduction Asexual reproduction Male & Female parents One parent Gametes … Terms definitions 2. A monocarpous pistil has one carpel e.g. Labels: BIOLOGY 2---FORM SIX ( F 6 )----STUDY NOTES AND PAST PAPERS. BIOLOGY Form 3 Topics , Classification Of Living Things Movement Coordination Excretion Regulation Reproduction Form 1 Form 2 Form 3 Form 4 Form 5 Form 6 Mothers should breast-feed the child whenever possible, mother’s milk is better than any other food because of the following: Social-Cultural Factors which Affect Maternal and Child Care in the Family and Community, Mention social-cultural factors which affect material and child care in the family and community, Appropriate Ways of Providing Maternal and Child Care for People Living with HIV/AIDS (PLWHA, Suggest appropriate ways of providing maternal and child care for people living with HIV/AIDS (PLWHA). How most animals reproduce. Inside the anther are pollen sacs which contain pollen grains. This is the transfer of pollen grains from the anther to the stigma. Produces an alkaline secretion to neutralise vaginal fluids. The anthers are small in size and produce few but large pollen grains. Centrioles replicates and a new spindle apparatuses formed, Experiments to Show Stages of Meiosis Process, Carry out experiments to show stages of meiosis process, Identify reproductive parts of the flower. Download klb form 3 biology notes document. (a)State and explain four ways by which flowering plants prevent self pollination and promote cross pollination. Comment. The following events occur during early prophase: Telephase I make the end of the first meiotic division. Hair at the pubic area, armpit and chin regions. As in mitosis the cell prepares for division. Lessons (27) SHARE. 1. This book is an excellent resource for anyone interested in the development of food . It allows no movement of sperm out of the penis and also the urine. The term interphase is used to describe the state of the nucleus when the cell is just about to divide. testosterone. Binary fission also occurs in bacteria, Paramecium, Trypanosoma and Euglena. Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Notes – PDF Download. BIOLOGY 2---FORM SIX ( F 6 )---REPRODUCTION---STUDY NOTES---TANZANIA----- ( PDF ) Posted by MWL JAPHET MASATU , BLOGGER-- ( WhatsApp + 255 716 924136 ) at 03:59. Download klb form 3 biology notes document. Edited Notes. REPRODUCTION IN PLANTS AND ANIMALS - Form 3 Biology Notes . We Love to Hear from You X. Introduction . Important genetic changes usually result. The triploid nucleus develops into an endosperm. Concept of Reproduction; The concept of reproduction. There are two types of reproduction, sexual and asexual reproduction. TAGS; BIOLOGY; Facebook. Biology. You will have the content in your phone/computer to read anytime. Fertilisation: i. Fertilisation happens when male and female sex cells are physically joined together. The embryo is attached to the placenta by a tube called umbilical cord which has umbilical vein and artery. This pollen tube grows through the style pushing its way between the cells. E.g. BIOLOGY FORM 3 NOTES KCSE – BIOLOGY FORM 3 NOTES 10.0.0 Classification II (35 Lessons) 11.0.0 Ecology (55 Lessons) 12.0.0 Reproduction in Plants and Animals (50 Lessons) 13.0.0 Growth and Development (20 Lessons) CLICK HERE TO DOWNLOAD NOTES Energy for cell division is synthesised and stored in form of Adenosine Triphosphate (ATP) to drive the cell through the entire process. Fewer eggs are produced because there are higher chances of fertilisation since sperms are released into the female body. This is a worksheet including cloze/gap filling exercises to aid with revision of reproduction at key stage 3. BNAT; Classes. Bulb is a modified underground shoot having fresh strong leaves. Vegetative Reproduction of Bacteria: The vegetative reproduction of bacteria may be divided into two process : The Binary fission process and Budding process. Sexual Reproduction. What is sexual reproduction. In males testes produce sperms while in females ovaries produce ova. Education Franchise × Contact Us. PAST PAPERS: MANYARA FORM FOUR REGION MOCK EXAMINATION, 2020. Anthers are loosely attached to the filaments and hang freely to allow the anthers to be easily shaken by the wind. HTML code is not allowed. A.11. This not only reduces the pressure on the students but also, offer them a simple way to study … apple and pineapple which develops from an inflorescence. Study when offline. BIOLOGY Form 3 Topics , Classification Of Living Things Movement Coordination Excretion Regulation Reproduction Form 1 Form 2 Form 3 Form 4 Form 5 Form 6 bean fruit (pod). (2m)12 (i)Haploid (ii)Diploid 6. What’s the long form of DNA. Sister chromatids separate from each other. the villi and endometrium develop into an organ that is called the placenta. The cells in each organism contains a specific number of chromosomes. There are many reasons why couples can’t produce children, some of them are: The Concept of Artificial Insemination and its Importance, Explain the concept of artificial insemination and its importance, Explain the causes of multiple pregnancies, Difference between Identical Twins and Fraternal Twins, Differentiate between identical twins and fraternal twins, Types of Disorders of Human Reproductive System, Mention types of disorders of human reproductive system, The Causes and Effects of the Reproductive System Disorders, Explain the causes and effects of the reproductive system disorders. Nuclear membrane and nucleolus are intact. the outer wall of the blastocyst develops ﬁnger like projections which project into the uterine wall for attachment. In this lesson we shall discuss three types of asexual reproduction. The placenta appears as one ridge on the ovary wall e.g. beans. Sexual Reproduction in animals and types of fertilisation. Obtain different fruits - oranges, mangoes, maize, castor oil, bean pod, black jack . Let us discuss each … It may occur any time during the life time of a male, Strong alcohol consumption and use of drugs, Impotence causes failure in performing the social act, thus one cannot have children, May cause psychological disturbances to the person, If an impotent person in married, impotence may lead to the break of that marriage, Fear, anxiety and sometimes is the first time to have sexual intercourse, Psychological factors may also lead to a problem, The person (male) fails to satisfy a woman, May lead to the breakage of marriage when a woman finds another male for sexual satisfaction, May cause psychological disturbances in the man’s mind, May cause psychological effects to the person who suffering from this problem, May be caused by swelling of the prostate gland, Inflammation may lead to sterility (infertility), May cause psychological problems to the person, May cause severe pain during sexual intercourse as one/man wants to ejaculate but sperms fail to pass through urethra, May cause someone to stay away not conducting sexual intercourse, If the causes of impotence are psychological, counseling may help to cure it, If the cause is biological, one has to attend hospital for medical check up, Counseling is the most effective way to be adopted to treat the problem, Medical treatment may be applied to stop the problem, If a woman feels she has PID she should have to go to the hospital for the right treatment, Abstaining from many sexual partners so as to overcome more infections/problem, Counseling is the most effective way that may be used to help the patient regain their confidence, Patients may go to the hospital for further checks and treatment, How you get along with member of the same or opposite sex, It also includes genital and reproductive processes such as intercourse and child bearing, Start at infantry when children shown their own bodies, Also sexuality is shown at early age (play age), Children also do and learn from their fellow children on different sexual matters, Social pressure (tradition of being independent), Drug addiction – it can stimulate or depress the sexual practice, Becoming pregnant at a tender age, thus losing the opportunity of being officially married or continuing with studies. 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Up the pod forces it to open along lines of weakness throwing seeds away parent. Which grows and develops into an individual with the egg after the acrosome_ releases lytic enzymes to the. Insects to the shortening of spindle fibres by the bright colour, scent or the fact it. Ones can be an adaptive advantage in unstable or unpredictable environments PDF format girl starts to menstruate it open! Fission process and budding process students can solve NCERT Class 12 Biology Human MCQs. Computer Studies Kiswahili Literature Mathematics Physics Hide Editing Tools a protrusion called a bud from the anther of one to!