Life Sciences Grade 11 P2 Eastern Cape November 2023 Memo

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2023 LIFE SCIENCES P2 MARKING GUIDELINE MARKS: 150 This marking guideline consists of 11 pages.

Downloaded from hlayiso.com 2 LIFE SCIENCES P2 (EC/NOVEMBER 2023) PRINCIPLES RELATED TO MARKING LIFE SCIENCES 1. If more information than marks allocated is given Stop marking when maximum marks is reached and put a wavy line and ‘max.’ in the right-hand margin. 2. If, for example, three reasons are required and five are given Mark the first three irrespective of whether all or some are correct/incorrect. 3. If whole process is given when only a part of it is required Read all and credit the relevant part. 4. If comparisons are asked for but descriptions are given Accept if the differences/similarities are clear. 5. If tabulation is required but paragraphs are given Candidates will lose marks for not tabulating. 6. If diagrams are given with annotations when descriptions are required Candidates will lose marks. 7. If flow charts are given instead of descriptions Candidates will lose marks. 8. If sequence is muddled and links do not make sense Where sequence and links are correct, credit. Where sequence and links are incorrect, do not credit. If sequence and links become correct again, resume credit. 9. Non-recognised abbreviations Accept if first defined in answer. If not defined, do not credit the unrecognised abbreviation but credit the rest of the answer if correct. 10. Wrong numbering If answer fits into the correct sequence of questions but the wrong number is given, it is acceptable. 11. If language used changes the intended meaning Do not accept. 12. Spelling errors If recognisable, accept the answer, provided it does not mean something else in Life Sciences or if it is out of context. 13. If common names are given in terminology Accept, provided it was accepted at the national memo discussion meeting. 14. If only the letter is asked for but only the name is given (and vice versa) Do not credit. Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2023) LIFE SCIENCES P2 3 15. If units are not given in measurements Candidates will lose marks. Marking guideline will allocate marks for units separately. 16. Be sensitive to the sense of an answer, which may be stated in a different way. 17. Caption All illustrations (diagrams, graphs, tables, etc.) must have a caption. 18. Code-switching of official languages (terms and concepts) A single word or two that appear(s) in any official language other than the learners' assessment language used to the greatest extent in his/her answers should be credited if it is correct. A marker that is proficient in the relevant official language should be consulted. This is applicable to all official languages. Copyright reserved Please turn over

Downloaded from hlayiso.com 4 LIFE SCIENCES P2 (EC/NOVEMBER 2023) SECTION A QUESTION 1 1.1 1.1.1 C ✓✓ 1.1.2 D ✓✓ 1.1.3 B ✓✓ 1.1.4 B ✓✓ 1.1.5 D ✓✓ 1.1.6 A ✓✓ 1.1.7 C ✓✓ 1.1.8 C ✓✓ 1.1.9 B ✓✓ (9 x 2) (18) 1.2 1.2.1 predator ✓ 1.2.2 census ✓ 1.2.3 (alcoholic) fermentation ✓ 1.2.4 prokaryotic ✓ 1.2.5 phylogenetic tree ✓/ cladogram 1.2.6 through ✓ gut 1.2.7 pathogen ✓ 1.2.8 food security ✓ (8 x 1) (8) 1.3 1.3.1 Both A and B ✓✓ 1.3.2 A only ✓✓ 1.3.3 Both A and B ✓✓ (3 x 2) (6) 1.4 1.4.1 Logistic ✓/S-shaped (1) 1.4.2 (a) Equilibrium ✓/ stationary phase (1) (b) carrying capacity ✓ (1) 1.4.3 The population is sexually immature ✓ They are getting used to the environment ✓ They are still looking for mates ✓ (Any 2 x 1) (2) 1.4.4 disease ✓ competition/lack for/of food ✓ competition/lack for/of water ✓ competition/lack for/of space ✓ predation ✓ parasitism ✓ (Any 2 x 1) (2) 1.4.5 natality ✓ immigration ✓ (2) 1.5 1.5.1 Gymnosperms ✓ / Spermatophyte (1) 1.5.2 They have well developed vascular tissue ✓ They have true roots, stems and leaves ✓/ not thallus (2) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2023) LIFE SCIENCES P2 5 1.5.3 Plant A does not need water for fertilisation ✓/reproduction. Gametes are transported by wind ✓ Plant B requires water for male gamete to swim to female gamete ✓ (3) 1.5.4 (a) rhizome ✓ (1) (b) frond ✓ (1) 1.5.5 It has true roots, stems and leaves ✓ (1) [50] TOTAL SECTION A: 50 Copyright reserved Please turn over

Downloaded from hlayiso.com 6 LIFE SCIENCES P2 (EC/NOVEMBER 2023) QUESTION 2 2.1 2.1.1 Fungi ✓ (1) 2.1.2 A – sporangium ✓ B – sporangiophores ✓ (2) 2.1.3 hyphae ✓ (1) 2.1.4 warm ✓ moist ✓ dark ✓ (Mark first TWO only) (Any 2 x 1) (2) 2.1.5 wine ✓ / beer / alcoholic drinks bread ✓ soy sauce ✓ cheese ✓/ yoghurt / maas (Mark first TWO only) (Any 2 x 1) (2) 2.1.6 • Act as decomposers breaking down dead/decaying organic ✓ matter returning recycled nutrients to the soil ✓ • Mushrooms are a food source ✓ for other animals ✓ • Fungi have mutualistic relationship ✓ with algae to form lichen ✓ • Mycorrhiza fungi live on roots of plants and act as root hairs for the plants ✓ • They grow on rocks and are pioneer plants, ✓ starting the process of soil formation ✓ • They are pathogenic ✓ and cause diseases in plants and animals ✓ (Mark first ONE only) (Any 1 x 2) (2) 2.2 2.2.1 (a) (amount of) petals ✓ (1) (b) fertilisation of ovule ✓ (1) 2.2.2 (a) anther ✓ (1) (b) sepal ✓/ calyx (1) (c) ovary ✓/ ovule (1) 2.2.3 Pollinators are attracted by the petals ✓ and therefore visit the flowers with petals more ✓ (2) 2.2.4 self-pollination occurred ✓ the pollen tube did not reach the ovary ✓ (2) 2.2.5 ensure all flowers have same exposure to insects ✓ use same species of flower ✓ use same colour flower ✓ (Mark first TWO only) (Any 2 x 1) (2) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2023) LIFE SCIENCES P2 7 2.2.6 The greater the number of petals the greater the chance/amount of fertilisation ✓✓ OR The number of petals increases the chance/amount of fertilisation that occurs ✓✓ (2) 2.2.7 Angiosperms have seeds ✓ have vascular tissue ✓ have a cuticle ✓ Do not rely on water for reproduction ✓ (Mark first TWO only) (Any 2 x 1) (2) 2.2.8 Spermatophytes ✓ (1) 2.2.9. offspring genetically different ✓ zygote covered in thick protective coat ✓ (2) 2.3 2.3.1 Protozoa ✓/ Protista (1) 2.3.2 • It is non-biodegradable ✓ • It builds up in the food chain and affects animals at the top of the food chain ✓ • It caused the decline of many birds of prey as it made the shells of their eggs very thin (Mark first ONE only) (Any 1 x 1) (1) 2.3.3 • It will have a negative impact on the economy ✓ • Because there will be less people working ✓/ earning money/ more money spent on medical care (2) 2.3.4 • The mosquito sucks up blood containing plasmodium from infected person ✓ • When it bites another person the mosquito spits some of it’s saliva containing plasmodium into it’s victim’s blood ✓ (2) 2.3.5 • Take medication before entering the malaria area ✓ • Prevent mosquito from biting them ✓/ or an example (2) 2.3.6 • Liver ✓ cells • Red blood ✓ cells / erythrocytes (2) 2.4 2.4.1 Porifera ✓ (1) 2.4.2 (a) Y ✓ (1) (b) X ✓ (1) (c) X ✓ (1) 2.4.3 Bilateral ✓ (1) Copyright reserved Please turn over

Downloaded from hlayiso.com 8 LIFE SCIENCES P2 (EC/NOVEMBER 2023) 2.4.4 • They have sense organs accumulated in the area that enters the new environment first ✓/ show cephalization. • They have developed a mesoderm from which muscles originate. ✓ • They have a coelom that separates the body wall from the gut wall so muscles can work independently. ✓ (3) 2.4.5 Caption: Body Plan of organism Y (fly) showing tissue layers ✓ Correct drawing ✓ Any 2 correct labels ✓✓ (Body layers must be in correct position to be awarded mark) ectoderm ✓ mesoderm ✓ endoderm ✓ coelom ✓ (4) [50] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2023) LIFE SCIENCES P2 9 QUESTION 3 3.1 3.1.1 Coal ✓ (1) 3.1.2 • Burning coal releases carbon dioxide ✓ • Carbon dioxide is a greenhouse gas ✓ • An increase in carbon dioxide traps more heat in the atmosphere ✓ • This increases the atmospheric temperature ✓ (4) 3.1.3 • Coal is a non-renewable resource ✓/ there is a limited amount of coal / coal is expensive / it pollutes the atmosphere. • Wind and solar power are free resources ✓ / cost of wind and solar generated electricity is lower / it does not pollute the environment. (2) 3.1.4 Mark allocation Caption (C) Caption has both dependant and ✓ independent variables Type of graph (T) Pie chart drawn ✓ Calculations 1–5 calculations correct ✓ ✓✓ All 6 calculations correct ✓✓ Portions correct size (S) 1–5 portion drawn to correct size ✓ ✓✓ All portions are drawn to correct size ✓✓ Segments are labelled (L) Labels on chart or in key ✓ Pie Chart showing the planned contribution of different sources of electricity for 2030 16% Coal Nuclear 11% Wind 46% Hydro Solar 10% Gas 15% 2% (7) 3.1.5 16 – 0,8 ✓ = 15,2 ✓% (2) Copyright reserved Please turn over

Downloaded from hlayiso.com 10 LIFE SCIENCES P2 (EC/NOVEMBER 2023) 3.2 3.2.1 Simple sampling ✓/ Quadrat method (1) 3.2.2 Samples should be random ✓ They should represent the whole area ✓ (2) 3.2.3 Average number of dandelions: (22+3+7+4+15+0+3+0+12+3+0+14+4+7+2) ✓ / 15 = 6,4 ✓ Total number of dandelions: 2 6,4 x 2 500 m ✓ 2 = 16 000 ✓ dandelion weeds 1m ✓ (5) 3.2.4 To increase reliability ✓ (1) 3.2.5 • To know how much weedkiller/herbicide to use ✓ • To know how long it would take him to pull out all the weeds ✓ (Mark first ONE only) (Any 1 x 1) (1) 3.3 Developed country Developing country Good medical care ✓ Poor medical care ✓ Low birth rate ✓ High birth rate ✓ Low death rate ✓ High death rate ✓ High economic standards ✓/ high Low economic standards ✓/ low standard of living standard of living Table ✓ + (Any 2 x 2) (5) 3.4 3.4.1 Water seeps through the pyrite rock ✓ And dissolves the sulphur ✓ in the rock, Forming sulphuric acid ✓ (3) 3.4.2 • It contaminates soil so that plants do not get the required nutrients to grow ✓ • It contaminates drinking water, disrupts the growth and reproduction of aquatic organisms ✓ (2) 3.4.3 • Lime must be mined ✓ which would cost more money ✓ • Slag is a waste product ✓ and is therefore free ✓/would not cost more (4) 3.4.4 • Causes thermal pollution ✓ (1) 3.5 3.5.1 Alien plants do not grow naturally in an area ✓ Indigenous plants grow naturally in an area ✓ (2) 3.5.2 They use a lot of water and nutrients and grow quickly ✓/ they have no predators and pathogens (1) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2023) LIFE SCIENCES P2 11 3.5.3 Chemical control ✓/ or example Mechanical control ✓/ or example Biocontrol ✓/ or example (Mark first TWO only) (Any 2 x 1) (2) 3.5.4 It blocks out the sun light ✓ plants cannot photosynthesise ✓ reduces the oxygen in the water ✓ and causes organisms to die ✓* (4) [50] TOTAL SECTION B: 100 GRAND TOTAL: 150 Copyright reserved Please turn over