a level biology essay questions and answers

20 mks. 5) What do you know about the leaves of ferns? 19) Fruits are not produced in gymnosperms. A collection of high mark, sample essays for A-Level Biology, providing helpful revision content and examples of logical structuring.

Secreted by the (posterior lobe/end) pituitary gland; in response to an increase in the osmotic pressure of blood; the hormone stimulates the distal convoluted tubules and the collecting ducts; to increase their permeability to water; this increases the reabsorption of water into the bloodstream; concentrated and less urine is excreted; when the osmotic pressure decreases, less or no hormone is produced; hence the tubules become impermeable to water; less water is reabsorbed into the bloodstream; hence more dilute urine is excreted; fluctuations in the osmotic pressure is detected by the hypothalamus; Secreted by the pancrease; in response to a rise in blood sugar level; it stimulates liver cells to convert the excess glucose into glycogen and fats for storage in the liver and muscle cells; increases the oxidation of glucose in respiration to yield water energy and carbon (IV) oxide/increases metabolism in the body; this leads to a fall in blood glucose to normal level; Secreted by the pancrease; in response to a decline in blood glucose level; it stimulates liver cells to convert the stored glycogen and fats back to glucose; stimulates the conversion of amino acids to glucose; and stops the oxidation of glucose in the body cells; the glucose formed is released to the bloodsteream causing a rise of blood glucose level to normal; Max. 14) Which one of the following fungi contains hallucinogens. 13) In which plants the annuals are absent? https://www.aqa.org.uk/resources/science/as-and-a-level/biology-7401-7402/assess/assessment-guides-essays, AQA is not responsible for the content of external sites. London WC1R 4HQ. 20 mks, Q8. £2.00. Answer: Because they are without any ovary. Biology Questions – Learn Basic Biology Part 1 (1-25). Loading... Save for later. 10) Five kingdom system of classification suggested by R.H. Whittaker is not based on: (a) Presence or absence of a well-defined nucleus. Square

34) An example of an edible underground stem is: (a) Carrot (b) Groundnut (c) Sweet potato (d) Potato. Find your group chat here >> Poll: Essay question Prediction Cycles (e.g Kreb or Nitrogen) Kidneys (Structure or/and Homoeostasis) Transport (e.g. Click the button below to download the full KCSE-MOCKS Biology essays Questions and Answers … Questions organised by topic, past papers & mark schemes.

Foundations in Biology. Below you will find a selection of free essay questions which have been made available to inspire you. 69) Name a plant that forms seeds but not fruits: 70) Which of the following are most suitable indicators of SO2 pollution in the environment? Why? Conditions. Q1. 53) Which green algae is parasitic on tea plant? Read: Chemistry Questions and Answers – Basic Chemistry, Check General Knowledge Questions and General Knowledge Quiz Questions and Answers. The list includes all Biology Questions with their Answers.

view results vote now. 87) Give two examples of epizoic green algae: Answer: Trichophilus on sloth, Characium on Crustacean. How is energy transferred within and between organisms, Different types of relationships and interactions between organisms, The membranes of different types of cells are involved in many different functions, The importance of DNA in science and technology. 21) Which one constitutes the dominant vegetation in colder regions? Answer: Laminaria, Nereocystis, Macrocystis. Explain why the following conditions are necessary for photosynthesis.

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Example Essay Questions. 1) Give an example of seedless vascular plants: Answer: Ferns. How does the insect attack? Describe what happens to a meal of oily beans and maize from the time of ingestion up to the time of absorption, In the mouth; starch in maize; is digested by salivary amylase/ptyalin/diastase into maltose; food is chewed and mixed by teeth and the tongue; rolled into boluses by peristalsis; it enters into the stomach via the cardiac sphincter; in the stomach, gastric juice containing pepsinogen that is activated to pepsin; digests proteins in the beans; into shorter peptides; food is churned and allowed into the duodenum; via the pyloric sphincter muscle; in the duodenum; bile juice secreted by the gall bladder; emulsifies the oils in the beans into tiny oil droplets; pancreatic juice; secreted by the pancrease; contains pancreatic amylase; that digests starch to maltose; pancreatic lipase; that digests the oil in the beans to fatty acids and glycerol; trypsin; digests proteins into shorter peptides;  food enters into the ileum; where succus entericus is secreted; it contains maltase enzyme; that digests the maltose into glucose; that is absorbed; peptidase; digests peptides into amino acids; lipase digests the remaining lipids (oil) into fatty acids and glycerol; which is absorbed through the lacteals of the villi; Max.

Answer: Leaves with associated sporangia. Answer: A. 20) What two special characteristics are found in human beings which have made them masters?

Preview and details Files included (2) pdf, 48 KB. 88) What is the name of the fruit body of polyporus? Please either accept the cookies, or, Teacher training guide: A-level Paper 3 essay, Training materials presentation: Preparing for the Biology Paper 3 essay. Includes essays on the titles: The Importance of movement in living organisms; Explain the importance of shapes fitting together in …

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