35) Where are stamens represented in Pinus? We adhere to the GDPR and EU laws and we will not share your personal information with or sell it to third-party marketers. (a) Morchella esculenta (b) Amanita muscaria (c) Neurospora sp. 18) Archaebacteria differ from eubacteria in: (a) Cell membrane (b) Mode of nutrition (c) Cell shape (d) Mode of reproduction.

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44) Why were the first organisms aerobic?

Square Essay-Questions . Please either accept the cookies, or, Teacher training guide: A-level Paper 3 essay, Training materials presentation: Preparing for the Biology Paper 3 essay. (a) Mucor has biflagellate zoospores (b) Haploid endosperm is a typical feature of gymnosperms (c) Brown algae have chlorophyll a and c and fucoxanthin (d) Archegonia are found in Bryophyta, Pteridophyta, and Gymnosperms. How is the mammalian heart adapted to its functions? A pack of essay questions to help student revise for exams and develop QWC skills. 6) It is much easier for a small animal to run uphill than for a large animal, because. So if you’re revising Cell Division for OCR (A) A-Level Biology, you can find all of the Cell Division questions that have been ever asked by OCR in one single document - useful, no?

52) When in the history of the earth did eukaryotes develop? (a) it is easier to carry small body weight. (a) Upper oogonium and lower round antheridium. 21) Which one constitutes the dominant vegetation in colder regions? 94) Which one of the following is wrong about Chara? 12) How the populations of different species are is kept under check? 2 1 customer reviews. 72) What is the name of the theory which believes that life originated somewhere else and it came to earth through meteorites?

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77) Where did the multicellular plant life originate? Content: 31 pages with 60 questions and answers. Preview and details Files included (2) pdf, 48 KB. Answer: Seeds are the source of replenishment of plants. Describe how the mammalian body protects itself against infections, Pathogenic microbes are found on the skin, respiratory tract, mouth, vagina and the intestinal tract; the skin; has a keratinised and waterproof cornified outer layer; that provides a mechanical barrier to microbes/prevents entry of microbes; sebaceous gland; produces sebum; which has antiseptic properties; the respiratory tract; produce mucus secretions that trap dust; cilia sweep/waft/propel the microbes to the pharynx for swallowing or to be coughed out; reflex actions of coughing/sneezing/vomiting help remove foreign materials from the respiratory tract/digestive tract; lysozymes/enzymes in saliva/nasal secretions/tears; digest walls of bacteria destroying them; gastric secretions such as hydrochloric acid lowers the pH in the stomach killing micro-organisms; clotting of blood; prevents entry of microbes after damage of blood vessels; phagocytosis; by phagocytes engulf and destroy microbes and other foreign bodies; lymphocytes are stimulated to produce antibodies; by proteins present in microbes protecting the body; antibodies destroy/kill micro-organisms through various ways: agglutinins; bind to pathogens making them clump together; killing them; Lysins; bind to pathogens and make them burst or disintegrate; opsonins; bind to pathogens making them easily recognized hence be engulfed/destroyed by other lymphocytes; anti-toxins; bind and neutralize toxins produced by micro-organisms; vagina is acidic; hence making it not conducive for growth and reproduction of micro-organisms; Max: 20 mks.

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Explain why the following conditions are necessary for photosynthesis. (a) Conifers (b) Algae (c) Fungi (d) Lichens.

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Preview. 76) What discovery formed the basis of agriculture? Carbon dioxide may affect organisms directly or indirectly.