SECTION B QUESTION Blue a. Colour of light 1 b. Time taken to release 20 bubbles = 490 / 5 = 98 3

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1 GRADE 11 LIFE SCIENCES P1 NOV 2016 MEMORANDUM TOTAL: 150 SECTION A QUESTION B Chlorophyll B D Iodine NONE B Carrying capacity A D Dialysis A A Inhalation A C Census BOTH 6X2= (12) A Lactic acid D deamination D Glomerular filtration C 2x10- (20) Migration 1x10= a. A gall bladder b. D - pancreas c. C small intestine d. F - Stomach (8) SECTION A {50} SECTION B QUESTION Blue a. Colour of light 1 b. Time taken to release 20 bubbles = 490 / 5 = : 1 : repeat the experiment several times Because each colour must receive the same amount of light to ensure that the results are valid

2 Graph showing time taken to release 20 Bubbles at different light colour Violet Blue Green Yellow Red Colour of Light Rubric Caption: 1 Right type of graph: 1 Correct label for x-axis: 1 Width and spaces between bars equal 1 Correct label for y-axis 1 Constant scale for y-axis 1 All plots correct 2 (8) 1 to 3 correct plots 1 (19) TO prove that carbon dioxide is released during cellular respiration a. to prove that CO2 is release as it turns milky in the presence of CO2 1 b. To prevent any gas form the atmosphere from entering the apparatus TO ensure that any impurities (bacteria)is destroyed ATP, Alcohol CO2 any The same apparatus without yeast and sugar solution 2 (10) a. increase 1 b. increase When the glucose level increase above normal levels the insulin converts the excess glucose into glucagon a. To ensure the investigation is reliable 2 b. To ensure the results are valid minutes 2 (11) Question 2 {40}

3 Question If the height above sea level increase/decrease then the number of red blood cells will increase/decrease only healthy people and they lived permanently at the different heights As the altitude increase the number of red blood cells increase More red blood cells are needed as the altitude increase because the amount of oxygen decrease as the altitude increase Johannesburg is located on a high altitude, meaning the atmosphere there contain less oxygen than at sea level. New Zealand players who mostly live at sea level have less red blood cells as those players that are living at altitude (Johannesburg). Oxygen reacts with Glucose during cellular respiration to form ATP-energy. If there is a lack of oxygen in the atmosphere and not a lot of red blood cells which carries oxygen to the muscle, then the players who do not live at altitude will get tired easy. That is the reason why they get tired close to the end of the match when they play in Johannes burg and prefer to play in Cape Town. any 4 4 (13) Primary Succession It started on bare rock Pioneer plants They help to break up the rock to form soil allowing other plants to grow 2 (5) P = M x C R = 500 x = a. overestimate 1 b. underestimate 1 (5) A cortex B Pyramid C Pelvis D - Ureter A - cortex Most of the liquids has been reabsorbed in the nephron 2 (8) When mineral salts crystallize in the nephrons Surgery Laser treatment 2 (4)

4 3.6.1 Longitudinal Section of the Malpighian Body 4.1 Geometric Growth Pattern Growth in population size where there are unlimited resources (food, water, space and no predation) This ideal environment results in maximum possible growth rate Population figures increase rapidly This growth pattern is also known as EXPONENTIAL GROWTH (J-curve) Characteristics of Geometric growth: In the beginning the increase in numbers are slow As there are only a few individuals This is known as the lag phase As time go on there is a sharp increase This occurs because condition became favourable Exponential phase no ENVIRONMENTAL RESISTANCE They have enough food water mating partners and shelter For the impala population this is not possible in a close environment The resources will become limited as the numbers of the impalas increase any 7 Logistic growth pattern (S-shaped) A young population of only a few impala is placed in an area with enough food, water, space and little predation The Four phases of logistic growth 1. Lag Phase: Slow growth because: Population adapt to new area They must become sexually mature They seek partners for mating They seek food, water, shelter, any3 2. Exponential phase Rapid growth occurs Very little or no environmental resistance Enough food, shelter, water and mating partners Natality is higher than mortality any 2 3. Decelerating phase Growth rate decrease due to increase in environmental resistance Natality is still higher than mortality any 2

5 4. Equilibrium Phase Population numbers reached Carrying Capacity Maximum number of impalas for this game reserve has been reached This game reserve cannot accommodate more impalas And stabilise Natality and mortality are more less the same any 3 CONTENT 17 SYNTHESIS 03 TOTAL 20 ASSESSING THE PRESENTATION OF THE ESSAY CRITERIA RELEVANCE LOGICAL SEQUENCE COMPREHENSIVE GENERAL IN THIS ESSAY All information provided is relevant to the topic There is no irrelevant information, Only info the two growth patterns Ideas are arrange in a logical sequence The info of the each of the growth patterns has been written in a logical way MARK R L C All aspect regarding the topic of the essay has been sufficiently addressed At least two aspects of each phase for both growth patterns is included.

LENTEGEUR SECONDARY GRADE 11 LIFE SCIENCES PAPER 1 NOVEMBER 2016 MARKS: 150 TIME: 2:30

LENTEGEUR SECONDARY GRADE 11 LIFE SCIENCES PAPER 1 NOVEMBER 2016 MARKS: 150 TIME: 2:30 INSTRUCTIONS AND INFORMATION 1. Answer all questions. 2. Number the answers correctly according to the numbering system