Life Sciences Grade 11 North West June 2017 Memo

PROVINCIAL ASSESSMENT MEMO GRADE 11 ENGLISH FIRST ADDITIONAL LANGUAGE LIFE SCIENCES NOVEMBERMarking 2011 Guideline JUNE 2017 MARKS: 150 TIME: 2½ hours This memo consists of 9 pages.

Lifel Sciences/P2 2 NW/November 2016 NSC – Grade 10 QUESTION 1 1.1.1 D 1.1.2 D 1.1.3 A 1.1.4 B 1.1.5 B 1.1.6 B 1.1.7 A 1.1.8 D 1.1.9 A (9x2) (18) 1.2.1 Spermatophytes 1.2.2 Homeostasis 1.2.3 Lacteal 1.2.4 Through gut.  1.2.5 Pathogen 1.2.6 Gametophyte 1.2.7 Fermentation/Anaerobic (7x1) (7) 1.3.1 Both A and B 1.3.2 A only 1.3.3 A only 1.3.4 None 1.3.5 Both A and B (5x2) (10) 1.4.1 Virus.  (1) 1.4.2 A- Protein coat B- Nucleic acid/DNA/RNA (2) 1.4.3 transmitted through close and direct physical contact with infected bodily fluids, the most infectious being blood, faeces, vomit, detected in breast milk, urine and semen Any 2 (2) 1.4.4 Antibiotics are used to kill the bacteria that infect the tissues following weakened immune system by the virus.  (2) (7)

Life Sciences/P1 3 NW/June 2017 NSC – Grade 11 1.5.1 A-Rhizoid B-Capsule.  (2) 1.5.2 Anchorage and absorption of water and minerals.  (2) 1.5.3 Gametophyte (1) 1.5.4 Spores  (1) (6) TOTAL SECTION A: 50 SECTION B QUESTION 2 2.1.1 (a) Light intensity (b) Number of gas bubbles  (2) 2.1.2 According to the number  of gas bubbles released (2) 2.1.3 30 gas bubbles per minute (2) 2.1.4 Carbon dioxide,  Temperature (2) (8) 2.2.1 (a) Sponges/ Porifera (2) (b) Sponges and jellyfish (2) (c) Snails (Mollusca) and Arthropoda (2) (d) Insects, millipedes and crustaceans (3) (e) Fish (1) (f) Birds (1) 2.2.2 Marsupials (1) 2.2.3 Feathers (1) 2.2.4 Reptiles and Mammals (2)

Life Sciences/P1 4 NW/June 2017 NSC – Grade 11 2.2.5 Organs, nervous system, vertebrae, jaws, fingers and toes, hair Any 4 (4) (19) 2.3.1 A-Bronchiole  B- Alveolus  (2) 2.3.2 Large surface area ( due to many alveoli),  transport system (many blood vessels)  Blood vessels are in closed contact with alveoli hence easy gaseous exchange Any two (2) 2.3.3 D has low concentration of oxygen and E has high concentration of oxygen / OR D has high carbon dioxide and E has low carbon dioxide  (2) (6) 2.4.1 A- Arthropoda B – Annelida (2) 2.4.2 C B A (3) 2.4.3 The exoskeleton cannot stretch as the animal grows bigger, Moulting has to occur for growth to take place  (2) (7) TOTAL FOR QUESTION 2: 40 QUESTION 3

Life Sciences/P1 5 NW/June 2017 NSC – Grade 11 3.1.1 37 800−23 800= 14 000 millions of rands (2) Assessment tool for marking the bar graph Assessment criteria Marks Correct type of graph (bar graph) 1 Title of graph present and correct 1 Correct units and Scale for y axis 1 Appropriate scale for x-axis/correct width of 1 bars 1 mark Plotting the bars 2 marks 1 bar is drawn 2 bars are drawn correctly (6) 3.1.3 (a) Wine.  (1) (b) It provides employment for many people · It provides income for people It allows the development of agri-industry for processing of raw products

Life Sciences/P1 6 NW/June 2017 NSC – Grade 11 It brings in foreign currency into the country/foreign exchange.  ANY (2) 3.1.4 a) sunflower  (1) (b) BEAN SEED Heading  Correct sketch  Any 2 labels  (4) (16) 3.2.1 carbohydrate  (1) 3.2.2 Source of energy/stored energy (1) 3.2.3 For people on a calorie-controlled diet OR who are allergic to a specific food OR who have specific dietary preferences e.g. vegans  ANY 2 (2) (4) Aerobic Anaerobic More energy produced a net of 36 Less energy produced a net of 2 ATP ATP

Life Sciences/P1 7 NW/June 2017 NSC – Grade 11 Oxygen needed Oxygen not needed Glucose incompletely broken Glucose completely broken down down into lactic acid and ethanol into CO2 and H2O and CO2   for the table (7) 3.4.1 Sterile means no micro-organisms are present/ all micro-organisms have been killed (1) 3.4.2 Microbes are found on human hair OR Microbes are not found on human hair. (2) 3.4.3 30°C.  (1) 3.4.4 This is closest to the optimum temperature for growth of bacteria (2) (6) 3.5.1 The flowers with petals attracted more insects for pollination than the flowers without petals.  OR The flowers without petals may not have attracted insects therefore less pollination. (2) 3.5.2 Some of the pollen tubes that developed were from the same flower/self- pollination occurred and only make little growth into the style/not all pollen grains make it to the ovary/does not fertilise the ovule.  (2) 3.5.3 Repeat the investigation and use the average  Increasing the size of the sample Use the same size flowers Use the same colour flowers Use the flowers of the same apple tree Ensure that all the flowers are pollen-free at the beginning of the investigation Use the same number of flowers

Life Sciences/P1 8 NW/June 2017 NSC – Grade 11 The same number of days for pollination/prevention of pollination/for fertilisation to take place ANY 3 (3) (7) TOTAL FOR QUESTION 3: 40 SECTION C QUESTION 4 Mouth  Mechanical digestion of all food groups in the sandwich.   teeth break foods down into small bits that you can safely swallow them  Chewing breaks food into smaller pieces and mixes it with saliva. Saliva softens the food and increases surface area for salivary amylase action on starch.   Before food passes from the mouth and down your oesophagus, salivary amylase, an enzyme in saliva, begins to digest the starch in the bread.   That is the start of chemical digestion.   The mass of chewed sandwich is called a bolus.  ANY 5(5) Stomach  the protein in polony and cheese is broken down into small units called peptides by enzymes - pepsins  Pepsin is the active protein-digesting enzyme of the stomach.   Pepsin acts on protein molecules by breaking the peptide bonds that hold the molecules together.   The stomach releases acids that create acid environment for best action of pepsin.   The stomach releases food into the small intestine in a controlled and regulated manner. 

Life Sciences/P1 9 NW/June 2017 NSC – Grade 11 ANY 5(5) Small intestines  Digestion of protein is completed in the small intestine by the pancreatic enzymes trypsin, chymotrypsin, and carboxypeptidase.   Fats in cheese and polony are mainly digested in the small intestine.   The presence of fat in the small intestine produces hormones that stimulate the release of pancreatic lipase from the pancreas and bile from the liver which helps in the emulsification of fats .   Lipids, or fat, present in polony and cheese go undigested in your digestive tract until they reach your small intestine, where they meet bile.   Bile contains bile salts, which act as an emulsifier of lipids This breaks the large fat droplets into smaller droplets that are then easier for the fat- digesting enzyme pancreatic lipase to digest.  Protein and starch digestion is completed in the small intestines where the end products amino acids and glucose are absorbed.   Lettuce contains fiber, which is good for avoiding constipation , it is not digested and passes through to the colon .  ANY 7 (7) Content: 17 ASSESSING THE PRESENTATION OF THE ESSAY Criterion Elaboration Mark Relevance All information No irrelevant information provided 1 provided is relevant (R) to the question Logical Ideas are arranged The process of digestion in the mouth, 1 sequence in a logical stomach and small intestine is (L) sequence discussed in the proper order Comprehensive Answered all All 3 aspects: digestion of 1 aspects required by carbohydrates, proteins and fats are (C) the essay in discussed. sufficient detail Synthesis: (3)

Life Sciences/P1 10 NW/June 2017 NSC – Grade 11 Section C : (20) GRAND TOTAL: 150