2.3.5 Other than the ovulation shown above, describe the events that need to occur for an ovum to be fertilised. (4)

2.2.3 (a) Calculate the difference in the weight of the left testis between the rats in Group 1 and Group 3. Show all your calculations, and round off to two decimal places. (2)

2.3.5 Kies nog ‘n voorbeeld van ‘n karakter eienskap wat oorgeerf kan word.  [1] (1)

2.3.6 Noem nog een voorbeeld, anders as die voorbehoedpil, wat deur vrouens gebruik kan word om swangerskap te verhoed.  (1)

3.1.4 Anne and Mike want to have another child. Draw a genetic diagram to show a cross between Anne and Mike. Include all the required steps and labels, plus the phenotype and genotype results and their ratios.Note: Diagrams must always be drawn by hand.  Scan or take a clear photo of your diagram and upload it in this question, using the button below. (10)

2.3.3 Wat is die mees algemene lengte reeks wat voorkom?   [1] (2)

4.1.7 Study your graph again. Choose the value that most likely represents the normal level of blood glucose. (1)   [A] mg/dL  

2.2 Read the following article and answer the questions that follow:    New bean varieties bred to beat the heat   March 26 2015 at 12:11pm   Scientists have bred 30 new varieties of “heat-beating” beans designed to provide protein for the world’s poor in the face of global warming.   Described as “meat of the poor”, beans are a key food source for more than 400 million people across the developing world, but the area suitable for growing them could drop 50 percent by 2050 because of global warming, endangering tens of millions of lives, scientists said.  Some of the 30 new types also have higher iron content to help increase their nutritional value, CGIAR, the research group backing the new discoveries, said in a statement.  New heat-tolerant beans might be able to handle average global temperature increases of 4 degrees celcius.   Bean growers in Latin America and sub-Saharan Africa – including Nicaragua, Haiti, Brazil, Honduras, Kenya, Tanzania, Uganda, and the Democratic Republic of Congo – are likely to be the worst hit by global warming, researchers said.  Some of these countries, dependent on small farmers to feed themselves, are not in good positions to adapt to a warming planet.  Clayton Campanhola, director of plant production and protection at the U.N. Food and Agriculture Organization, said the discovery of new “climate-smart” bean strains is a big deal.  Adapted from: New bean varieties bred to beat heat (2021). Available at: https://www.iol.co.za/news/new-bean-varieties-bred-to-beat-heat-1837457 (Accessed: 21 June 2021).  

1.3  Organisms are classified according to specific classification schemes. Order the classification levels below starting with the least specific level to the most specific level: [A] (least specific) [B] [C] [D] [E] [F] [G] (most specific) (7)

SECTION A QUESTION 1 1.1 Ten multiple-choice questions are given below. Choose the most correct answer for each. 1.1.1 The diagram below shows part of a DNA molecule. CLICK ON THE BUTTON BELOW TO VIEW THE DIAGRAM:      The correct labels for X, Y, and Z are: A. deoxyribose sugar, phosphate, and hydrogen bondB. phosphate, deoxyribose sugar, and hydrogen bondC. ribose sugar, nitrogenous base, and peptide bondD. phosphate, ribose sugar, and peptide (2)