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ICSE Class IX Mid-term 2023 : Biology (GEMS Modern Academy, Dubai)

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SECOND TERM EXAMINATION -2022 BIOLOGY GRADE: 9 DATE: 15.11.2022 TIME: 2 HOURS MARKS: 80 [The time stated above is the time allowed for writing the examination. In addition 15 minutes will be the time given for reading the question paper] General Instructions: 1. There are 2 sections in this question paper SECTION A and SECTION B. 2. Attempt all questions from section A. 3. Attempt 4 questions out of 6 questions in section B. 4. The intended marks for each question is given in the brackets [ ]. SECTION A (40 MARKS) Question 1 Select the correct answers to the questions from the given options. Do not copy the question. Write the correct option only. [15] (i) Which class of vertebrates that includes animals with leathery shell on eggs, a three chambered heart with a partially divided ventricle and dry scaly skin? A. Amphibians B. Reptiles C. Birds D. Mammals (ii) Sweat glands are located in this region of skin A. Epidermis B. Below adipose tissue C. Dermis D. Both A and C Page 1 of 10 (iii) The following table shows some minerals and vitamins present in four foods Which food would be best for a child who has rickets? Food Calcium Iron Vitamin C Vitamin D A Present Absent Present Absent B Present Absent Absent Present C Absent Present Present Absent D Absent Present Absent Present (iv) The digestion of starch is not possible in stomach because A. starch is completely digested in the mouth B. The pH in stomach is not suitable for the action of amylase to work C. The starch does not stay in the stomach for long time D. The temperature of stomach does not support the digestion of starch (v) These muscles cannot get tired soon. A. Skeletal and smooth muscles B. Skeletal and cardiac muscles C. Smooth muscles only D. Cardiac muscles only (vi) How is the surface of skin made waterproof? A. By secreting sweat B. By secreting sebum C. By secreting salts D. Both A and B (vii) Small molecules are used to make larger molecules. Which of the following statement is correct? A. Amino acids are basic units of carbohydrates B. Fatty acids are basic units of glycogen C. Amino acids are basic unit of proteins D. Fatty acids are basic units of proteins Page 2 of 10 (viii) Find the incorrect pair from the following A. Thallophyta Flowering plants B. Bryophyta Mosses C. Pteridophyta Ferns D. Angiosperms Flowering plants (ix) Identify the organ from the following that is neither used in digestion nor absorption but is an integral part of digestive system A. Stomach B. Duodenum C. Appendix D. Colon (x) Vitamin A deficiency results in A. Night blindness B. Pernicious Anemia C. Scurvy D. Rickets (xi) Which of the following is the correct pair? A. Stratum corneum Middle layer of epidermis of skin B. Stratum malpighi- Outer layer of dermis of skin C. Stratum malpighi innermost layer of epidermis of skin D. Stratum corneum inner most layer of dermis of skin (xii) The following table shows some features of some animals. Which animal could be a bird? Animal Feature Feathers Gills Hair Wings A Absent Present Present Absent B Present Present Absent Absent C Present Absent Absent Present D Absent Absent Present Present Page 3 of 10 (xiii) Mosses and liver worts belong to this group of plants A. Thallophyta B. Bryophyta C. Pteridophyta D. Gymnosperms (xiv) The chief source of Vitamin C is A. Meat B. Citrus fruits C. Fish D. Wheat (xv) The following statements are about the enzymes a. Enzymes are catalysts b. Enzymes are proteins c. Enzymes are used up in digestion Which statements are correct? A. Both a and b B. Both a and c C. only a D. Both b and c Question 2 (i) Give a scientific reason for the following statements. [5] (a) Churning in stomach is vital for digestion (b) Birds have light skeleton and streamlined body (c) Heterodont dentition suits all the feeding habits in humans (d) Mother s milk is crucial for newly born babies (e) Humans cannot digest vegetable fibres in our body (ii) (a) Draw the diagram of neuron and label any four parts. [3] (b) What will happen if the neuron does not have extensions in it? [1] (c) Name the part of neuron that acts as an insulating layer? [1] Page 4 of 10 (iii) Make the correct pairs from the following. [5] Echinoderms, Phylum Platyhelminthes, Bryophyta, unsegmented body, molluscs, gymnosperms, tube feet, bilaterally symmetrical, round worms, muscular foot, cones, phyllids, Thallophyta (iv) A group of Grade 9 students were provided with a mixture of food items. They were instructed to investigate and find the presence of glucose and proteins in the given sample. The reagents they are permitted to be used are provided to them. (a) Name the reagent used in each of the investigation to check glucose and proteins. [2] (b) State the colour change the students are expected to observe if the mentioned nutrients are present? [2] (c) How the students can check the presence of starch in the given sample? [1] (v) Differentiate between the following based on the criteria mentioned in the brackets. [5] (a) Poikilothermal animals and homeothermal animals (definition) (b) Xeropthalmia and scurvy (One Symptom) (c) Phylum Platyhelminthes and Phylum Nematoda (Body shape) (d) Absorption and assimilation (meaning) (e) Sebaceous glands and sweat glands (function) Page 5 of 10 SECTION B (Attempt any FOUR questions from this section) Question 3 The diagrams below shows chnages in structures in human skin under two different external conditions. (i) Identify the external condition 1 and condition 2. [1] (ii) State the visible difference between condition 1 and condition 2 in terms of changes in sweat glands and blood vessels. [2] (iii) Name the phenomenon in each of these conditions. [1] (iv) Which of the layers of skin that produces keratin and melanin. [1] B. Study the following diagram and answer the questions that follow. A B C D (i) Identify the structure labelled A and B. [1] (ii) What will happen if the structure B is removed surgically? [1] Page 6 of 10 (iii) Write the role of structure C in the digestion of proteins and carbohydrates? [2] (iv) How the structure D supports digestion of proteins? [1] Question 4 A. Observe the arrangement of teeth in the following figure. Answer the questions that follow. (i) Identify the canines and incisors in the figure given above. [1] (ii) How are the teeth C and D adapted for their function? [1] (iii) Write the dental formula for an adult human. [1] (iv) State the location of the following. [2] (a) parotid gland (b) cardiac sphincter B. (i) When some cooked rice is kept on our tongue for some time, it tastes sweet- Give a scientific explanation [1] (ii) Identify the group of plants to which each of the following belongs. State one identifying feature for each of the following. [2] (a) (b) (iii) Write any two visible features of Kingdom Protista. Page 7 of 10 [2] Question 5 (i) Show the digestion of starch in duodenum through equations. [2] (ii) State the importance of bile in digestion in duodenum. [2] (iii) Draw the fully labelled cross section of a villus. [3] (iv) Observe the following figures and answer the questions (i) (ii) (a) Identify nutritional deficiency disease in the figure (i) and figure (ii) [1] (b) Name one symptom that can be seen in figure (i) but not in figure (ii) [1] (c) How is idoine useful in our body fucntioning ? [1] Question 6 A. (i) We do not need to digest vitamins and minerals-Give a scientific reason. [1] (ii) Removal of faeces is not excretion Justify the statement. [1] (iii) State the function of saliva other than digestion [1] (iv) Compare and contrast skeletal and smooth muscles [2] B. (i) Identify the following pictures of organisms. Answer the questions that follow. (ii) (i) (a) Identify the organisms shown in the figures above. Page 8 of 10 [1] (b) Name the kingdom to which each of the organisms shown in the figures belong.[1] (c) Write one characteristic feature for each of the kingdom you mentioned in the above answer [2] (d) Name the thread like structures found in the body of organism (i). [1] Question 7 A. (i) Name the following. [2] (a) The form of food formed after digestion in stomach (b) Soft part of teeth that has blood vessels (ii) State one role of calcium other than bone formation . [1] (iii) Explain the importance of chewing in the digestion of food. [1] (iv) State one function of hydrochloric acid in stomach other than digestion. [1] B. (i) State TRUE or FALSE. If False correct the statement by changing the underlined word(s). [5] (a) Oesophageal sphincter is present at the opening of stomach into duodenum. (b) Pernicious anaemia is caused due to deficiency of Vitamin B12 (c) Kingdom Monera includes multicellular eukaryotes (d) Root like structures of bryophytes are rhizoids (e) In Cartilagenous fishes gills are covered by operculum Question 8 A. (i) State the importance of piloerection in skin? [1] (ii) Differentiate between Class Pisces and Class Amphibia in terms of the number of chambers in their heart [1] (iii) Which element is present in proteins but not in carbohydrates and fats? [1] (iv) Name the following [2] (a) Pancreatic amylase (b) Milk digesting enzyme in stomach Page 9 of 10 B. (i) Following figures show the leaves of different plants. Name the group of plants to which each of the following leaves belong. Give a reason for your option. [2] (a) (b) (ii) Find the odd one out. Write the category to which others belong. [2] (a) Caecum, colon, duodenum, rectum (b) Glucose, maltose, fructose, galactose (iii) Define peristalsis. [1] Page 10 of 10

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