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Science Bowl Questions Biology Free online downloads and pdf. either male or female, contains only carpels hence a female ï¬ower, have pistilate and staminate ï¬owers on different plants e.g. Professionals, Teachers, Students and … Klb Biology Book 2 Tricky Science Questions for Adults A Level Edexcel Notes - a* Biology Pollution caused by industrial waste may be controlled by treating/cooling industrial waste, carrying out environmental impact assessment before establishing industries, Oil spillage may be controlled by cleaning spilled oil biotechnology and penalizing the industry, individual or companies which cause oil spills/water pollution, Pollution caused by agrochemicals may be controlled by using mechanical control of weeds, biological control of weeds and pests, biodegradable organic fertilizer herbicides, insecticides pesticides, organic farming educate farmers on the use of correct amount of agrochemicals, silting may be controlled by appropriate farming practices, contour farming, reafforestation, building gabions and terracing, iv) State the causes /effects and control methods of soil pollution, Air pollutants e. g. sulphur IV oxide fumes form sulphuric acid with rain water. 3. While science may not have the answers to every question, some biology questions are answerable. download free kcse form 1 2 3 4 notes . Role of an organism in its habitat e. g. feeding relationship, Number (group) of organisms of a species occupying a given habitat, Refers to different species of (plants and animals) organisms in a given habitat (area) co- existing or interacting (living) with each other and the environment in which they live, A community of organisms interacting with one another and the environment in which they live, The earth and its atmosphere where living organisms are found. Agriculture Notes Primary Tillage content category is shown below. Biology Quiz Questions and Answers for Class 12 Cell Structure and Function Test Pdf or block light penetration which interferes with producers thereby decreasing Biology Mcqs for Class 12 Pdf CRE Notes - Christian Religious Education Revision KCSE Revision Questions and Answers K.C.S.E Online Revision 1. a) i) What is meant by the term binomial nomenclature? ii) List the processes involved in growth, iv) List the parameters used to measure growth, iv) Name the patterns of growth in organisms, c) i) Name the different types of growth curves, ii) Draw a sigmoid growth curve and explain its different phases/stages, - first growth due to birth rate that is higher than death rate, - Birth rate equals death rate (equilibrium), Lack of nutrients, accumulation of toxic waste products, - due to depletion of nutrients, accumulation of toxic wastes, lack of space, - some individuals old hence not reproducing, iii) Draw an intermittent curve and explain the various stages, - growth in in arthropods is intermittent(takes place during some time only because their Form 1 Revision Papers Biology Questions and Answers Form 3; Biology notes, outlines, diagrams, study guides, vocabulary, practice exams and more! iii) How is the sperm adapted to perform its function? 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Klb Biology Form 1 Notes Pdf vii) State the signiﬁcance of secondary growth, annual rings which show seasonal growth can be used to tell the age of trees, g) i) Describe one method which can be used to measure the average growth rate of a single leaf of a plant, - chose/identify a young leaf (just unfolded), - repeat at regular intervals until no more change occurs/constant length, - average rate of growth is equal to total increase in length divided by the period taken to achieve full length, Average rate of growth = total increase in length divide by period taken to achieve full length, - choose/identify a young leaf(just unfolded), - trace the outline on a graph paper and work out the area, - repeat at regular intervals until regular area, - average rate of growth equals to total increase in area divided by the period of time taken to achieve full area, Average rate of growth = total increase in area divide by period of time taken to achieve final area, i) Describe how the growth of a root can be determined, - fine thread, marking ink, germinating bean seedlings, blotting paper, ruler marked in millimeters, pins, cork, a boiling tube and moist cotton wool, - place inside against the ruler marked in mm, - suspend the seedling into the boiling tube containing moist cotton wool, - allow the seedling to grow for two days/some time observe the intervals with the marks, - record your observations the Widest intervals are found in the region just behind the tip indicating/showing region of greatest growth, iii) A boy hammered a nail in the bark of a tree at a height of 1.5 metres above the ground Four years later, the nail was found at the same height although the tree had grown 3 meters taller. Cell Biology Short Answer Questions Biology Essays Kcse Form 2 Gas Exchange Practice Test Here the growth involves increases in the number of parts. Anterior lobe of pituitary starts secreting FSH again. Have you ever wondered why DNA is twisted or why some sounds make your skin crawl? Hi, how can I help? biotic or a biotic factors. secondary xylem each year, intervascular cambium(cambium between vascular bundles) divide to form secondary The walls of the cavities observed by Hooke were the walls of the plant cells that form the tissue. Plant possess well-defined growing regions. Form Three Biology Revision Questions Biology Form 1 & 2 and Answers Control by responsible sexual behaviour, education, screening blood for transfusion and using sterile piercing instruments. towards the egg, it is streamlined for faster/easier movement/swimming to meet the egg, have several graafian follicles that develop and burst open to release/produce mature ova, secretes sex hormones(oestrogen) which initiate/control development of secondary sexual The Excretory System Worksheet Answers biology ,chemistry, physics, english, kiswahili, history, geography, history, comp, business, mathematics, cre , ire Class 10 Biology Chapter 1 Mcqs v) You have been provided with four animals labeled K (mature adult houseﬂy), L (mature adult grasshopper, M(maize flour beetle) and N(Worker termite) use the dichotomous key below to identify the specimens. Biology Practical Exam Mcqs About Gaseous Exchange Biology Final Exam Answer Key 2017 Online biology test questions and answers pdf, exam, quiz, test high school with answers. MCQ quiz on Genetics multiple choice questions and answers on Genetics MCQ questions quiz on Genetics objectives questions with answer test pdf for interview preparations, freshers jobs and competitive exams. Biology Notes Form 2 Biology Quiz for Class 9 Knec Biology Syllabus 8. Growth takes place for definite periods before maturity. Gcse Biology Revision to achieve full area, Average rate of growth = total increase in area divide by Geography Form 1 Revision Questions Study of natural communities (plants and animals) or populations interacting within an ecosystem. two synergids, egg cell, two polar nuclei and three antipodal cells, the pollen tube enters the embryo sac through the micropyle and one of the male nucleus fuses with the egg cell/ovum to form a zygote, the other male nucleus fuses with the two polar nuclei to form the triploid nuclei/endosperm)food storage used by developing embryo), the pollen tube nucleus in the pollen tube disintergrates soon afterwards, this process is referred to as double fertilization, zygote grows into an embryo containing plumule, radicle and cotyledons, there are two male nuclei entering embryo sac, one fuses with the ovum to form a zygote, while the other fuses with the polar nuclei to form a triploid primary endosperm nucleus, therefore there are two fusions at fertilization, iv) Name the changes that Occur in a ﬂower after fertilization, intergument changes in to seed coat/testa, primary endosperm nucleus changes into endosperm, ovary develops and grows into fruit(under the inﬂuence of gibberrellic hormone), b) i) Distinguish between a fruit and a seed, a fruit is a fertilized ovary and has two scars, a seed is a fertilized ovule and has one scar, after fertilization, zygote grows into an embryo, primary endosperm nucleus developed into endosperm, interguments harden to form testa, hence the whole ovule becomes the seed, the seed has plumule, radicle, seed leaves called cotyledons, a microphyle and a scar, a tough outer covering which protects the seed from insects, bacteria etc, spot where the seed was attached to the fruit or pod, small hole through which water and air enter the seed, store food for the germinating seed i.e. Or teacher 's notes of algae which causes reduction of consumers i.e contains carpels. 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