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Q1— Section header —
1.1.6
1.1.1According to the theory of cont inental drift, all the land masses were
1.1.2Which ONE of t he following is an example of a pair of analogous structures?
1.1.3Study the diagram below showing the pelvis and femur of a snake. In humans, the pelvis and femur are involved in walking. In snakes, functional structures. analogous to the pelvis and femur in humans.
1.1.5different palaeontological sites.
1.2BOOK.
1.2.5which can be supported by fact s, laws and tested hypotheses of oxygen The variety of living organisms on Earth
1.1.4
1.2.1An explanation for so mething that has been observed in nature and An increase in the level of nutrients in dams and lakes that leads to increased micro-organism activity and a decrease in the availability
1.3B: Oil
1.3atomy B: Fossil records
1.3Forms acid rain A: Carbon dioxide B: Sulphur dioxide
1.3such as genera, families and orders A: Macro-evolution B: Micro-evolution
1.3May lead to overexploitation of resources A: Poverty B: Lack of food (10)10
1.3Indicate whether each of the statements in COLUMN I applies to BOTH A AND B or B only both A and B or next to the question number (1.3.1 to 1.3.5\ the ANSWER BOOK. COLUMN I COLUMN II
1.4of abalone that is: abalone along a marine coast 50
1.4.4that which was allowed for legal harvesting? the current trend continues. resources, such as abalone. possible
1.4.1In what year did poachers harvest the same amount of abalone as State ONE conclusion about the future population size of abalone if Name THREE possible impacts on the environment if humans continue overexploiting marine
1.5.4(2) (4)4
1.5A group of learners collected water samples at different places ( and along the same river to compare the le vel of substances as well as the organisms present. The graph below shows the changes in the amount of substances (oxygen
1.5.1Which organism (listed in the table above\e (a\ (1\
1.5.2Name TWO factors that should be k ept constant while collecting the water samples. Explain TWO precautions that the learners should take to ensure their own safety while collecting the samples. Use the graph to describe the rela
1.6.2Which ONE of the three eras had the longest duration? (1)1
1.6eras. Answer the questions that follow. Ordovician extinction extinction Permian extinction Life Sciences/P2 (Version 2\Part-time\8 DBE/November 2011
1.6.3Name the mass extinction that took place 100 million years ago. Study the diagram be low which shows some geologic al periods of the three Ordovician extinctionCretaceous
Q2— Section header —
2.1.2(1) (7) (8)8
2.2.2(6) (4) (10)10
2.3State TWO differences between and Darwin's theory (4) (3)3
2.5.2List THREE disadvantages of inbreeding. (2) (3) fish species 2
2.1The diagrams below show the change in fish species in a lake from 250 million years ago to 100 m illion years ago. The water level in the lake had Which process is illustrated in the diagrams above? Describe the process named in QUEST
2.2Describe how the following Meiosis Sexual reproduction Lamarck's theory
2.4Name THREE features that are us ed in comparative em bryology to show similarities and differences bet ween vertebrate embryos. Explain ONE advantage of inbreeding. fish species 1 Lake about 250 million years ago
Q3— Section header —
3.2The following questions are based on mutations:
3.1.2gorilla and that of a human. characteristics that we (7) (3) (10)10
3.2.3Define a Name TWO factors that can cause mutations. Differentiate between and
Q3— Section header —
3.2.1
3.3on germinating seeds. She set up the apparatus below.
3.3.6Name the independent variable in this investigation. r Thandiwe's investigation. her investigation.
3.3.1Formulate a possible hypothesis fo Describe ONE way in which Thandiwe ensured reliable results in Explain why the percentage of ge rminating seeds differs under What was the average percentage of seeds that germinated when
Q4— Section header —
4.1coloured peppered AMOUNT OF POLLUTION (g/m
4.1.4Give the table above a heading. Name the dependent variable in this investigation. population size and the amount of pollution. data above.
4.1.1Make a general conclusion ab out the relationship between the Plot TWO line graphs on the same set of axes to represent the
4.2The table below shows the amount of waste generated from different products and the time taken for each produ
4.2.4Define non-biodegradable products and give an example of each. Calculate the percentage contribution
4.3Explain FOUR management strategies to improve the quality of drinking water. Your description must also incl ude TWO sources of water pollution and