Angel International School - Manipay 2 nd Term Examination March, 2018 Biology

Transcription

1 Grade 07 Angel International School - Manipay 2 nd Term Examination March, 2018 Duration: 2.00 Hours 1) Underline the correct answer: Part 1 1) Given below are some adapative features of plants: (i) It have a root act as a stabiliser. (ii) leaves droop to conserve water. (iii) plants form a bulb in the soil. (iv) leaves have feathery structures. Which of them are the adaptive features of a DUCKWEED water plants? a) i is correct c) i,ii, and iii only b) i and ii only d) i, ii, and iv only. 2) Which of the following statement is incorrect for herbivorous animals? a) They have large teeth for grinding up the food. b) They are the prey of predators. c) They have many body colours help them to blend into surroundings. d) They hide during day and come out at night. Index No:- 3) Which statement best describes the flow of energy as it passes through the organisms in the pyramid? a) Energy flows through the organisms from bottom to top and increases at each level. b) Energy flows through the organisms from bottom to top and decreases at each level. c) Energy flows through the organisms from top to bottom and increases at each level. d) Energy flows through the organisms from top to bottom and decreases at each level. 4) The diagram below shows a simple FOOD WEB : OWL RED FOX BLACK BEAR RABBIT PLANT DEER From the FOOD WEB which animal is classified as an omnivore? a) red fox b) deer c) black bear d) rabbit 5) We get energy from the food we eat. The energy in the food first comes from the, a) Soil c) sun b) fertilizers used by farmers d) vitamins added by food manufactures 6) The acid present in the stomach a) kills the harmful bacteria b) protects the stomach lining from harmful substances c) digests starch into sugars d) makes medium alkaline 7) The diagram below shows a FOOD CHAIN PLANT GRASSHOPPER LIZARD EAGLE The LIZARD in this food chain is, a) primary producer b) primary consumer c) secondary consumer d) tertiary consumer Gr7-1

2 8) First process of digestive process is a) Chewing b) digestion c) ingestion d) egestion 9) General name for enzymes which digest proteins is a) Pepsin b) renin c) lipase d) protease 10) Component from plants that our stomach cannot digest is a) Vitamin b) mineral c) cellulose d) centrioles 11) A substance which provide nourishment is called a a) Food b) carbohydrates 12) Bleeding of gums is called, a) Scurvy b) rickets c) nutrient d) minerals c) kwashiorkor d) night blindness 13) knife like teeth which slice food into smallpieces are called a) molars b) canines c) incisors d) premolars 14) A long tube that carries food from the mouth to the stomach a) Trachea b) esophagus c) urethra d) large intestine 15) The opening at the end of the digestive tract in which solid wastes are eliminated, a) Anus b) Mucosa c) Liver d) Rectum 16) Which enzymes breakdown of starch molecules into sugar molecules? a) Protease c) Amylase b) Lipase d) Carbohydrase 17) Mechanical breakdown of food is due to a) hydrochloric acid b) pepsin 18) Main cause of indigestion of food is due to a) lack of chewing b) lack of saliva 19) Large molecules in food that we eat are a) carbohydrates and fats b) carbohydrates,proteins and fats 20) Egg laying mammal is a) Kangaroo b) marsupials c) chewing d) persistalsis c) lack of water in the body d) infection c) fats and proteins d) carbohydrates and proteins c) platypus d) weasel 21) What is the name of the hormone that makes your heart beat faster and increase more blood to muscles? a) Gonadotrophin c) adrenalin b) insulin d) pepsin 22) i) When fertilization takes place in flowering plants, seeds and fruits are produced. ii) When fertilization takes place in flowering plants, only seeds are produced. iii) When fertilization takes place in flowering plants, seeds, flowers and fruits are produced. From the given above statement select which is correct? a) only ii) is correct c) both i) and iii) is correct b) only i) is correct d) all the above. 23) Development of the embryo takes place in the. a) Fetus b) uterus c) placenta d) amnion 24) Which insect have strong jaws for nibbling a leaf? a) Slug b) caterpillar c) snail d) moth Gr7-2

3 25) Which nutrients use to store energy? a) Carbohydrates b) proteins 2) Match the column I with column II COLUMN I COLUMN II c) fats d) vitamins 1. salivary gland a) acid release 2. cytoplasm b) storage of undigested food 3. fungus c) watery jelly 4. stomach d) respiratory system 5. rectum e) petals 6. corolla f) saliva secretion 7. beetle g) endocrine system 8. adrenal gland h) female part of flower 9. lungs i) water animals 10. stigma j) yeast 3) Say true (T) or false (F). (25 marks) (10marks) 1) Digestion of starch starts in the stomach. [ ] 2) The gall bladder temporarily stores bile. [ ] 3) Fat is completely digested in the intestine. [ ] 4) Cellulose is a type of carbohydrate. [ ] 5) The male gametes form inside the stigma. [ ] 6) sepals has the stalk and anther. [ ] 7) After fertilization,embryo plant develops the root and shoot for food store. [ ] 8) After fertilization in placental mammals, the egg moves into female reproductive system called womb. [ ] 9) The uterus and abdominal muscles are used in birth process. [ ] 10) A food web is an energy transfer system. [ ] 1) Answer the following: 1. Identify the given picture, and label it. PART 2 (i) What are the two process involved in the breakdown of food? (ii) What are the kinds of teeth? (iii) Which type of teeth do herbivore and carnivore animals have? Herbivore:..... Carnivore:... Gr7-3

4 2. Fill the tabular column in given below: VITAMIINS DEFICIENCY DISEASES FOOD SOURCES Night blindness..,. Vitamin B.. Bread, Vitamin C....,. (4 marks) a) Identify the given picture and label it. b) From the above picture which part of the digestive canal is involved in: i. absorption of food ii. chewing of food. iii. killing of bacteria.. iv. complete digestion of food. v. formation of faeces. 4. a) Label the following parts in the given picture and answer below questions in a word: b) The largest gland in our body c) The organ where protein digestion starts d) The organ that releases digestive juice into the small intestine e) The organ where bile juice gets stored f) Does bile juice digest fat completely? (6 marks) Gr7-4

5 5. Read each statement and write the terms that gives one word for each statement: (i) Removal of undigested solid food from the body. (ii) Taking food into the body. (iii) The pollen- producing organ. (iv) The outer part of flower is formed by a ring of sepals. (v) Controls the centre of cell. 6. Using the below picture, Answer the following question. a) Which organ of the digestive system produce 3 kinds of enzymes? i.., ii..., iii... b) What kind of enzyme is produced in, i. mouth:.. ii. stomach:. c) Name an enzyme that digests the nutrients, i. carbohydrates: ii. protein:. iii. fat:. 7. Define the following terms (ANY5): (i) Adaptation- (ii) Predators- (iii) Gonodotropin- (iv) Fertilisation- (v) Pollination- (vi) consumer- (vii) Absorption- (viii) Nutrient- (9 marks) (10 marks) 8. Give one example of an animal with its characteristic features that can live both on land and in water. (2 marks) Land: Water: 9. Fill in the blanks: (i) The main steps of nutrition in humans are...,.,...,..,. (ii) The stomach release. acid and.. juices which act on food. (iii) Aminoacids are basically used for (iv). is a deficiency disease caused by a lack of vitamin c. (4 marks) Gr7-5

6 10. a) Identify the picture. and label the parts. b) From the picture which part contains green pigment?.. c) Name the parts which contain a liquid called cell sap?... d) Write any two points about the function of Nucleus? a) Identify the picture what system it refers?. b) Label the parts space provided in given diagram. c) From question a) by identifying the system write its function? (3 marks) 12. a) Identify the picture what system it refers?. b) Blood is a [ liquid/gas/solid] c) Blood pumps and moves along the tubes called.. xylem vessels/blood vessels (2 marks) ***** Gr7-6