2.1.1 Wat is die energie per 100g in joule? (2)

  QUESTION 3 Read the following case study on Cancer and answer the questions that follow:   Differences between Cancer Cells and Normal Cells Cancer cells differ from normal cells in many ways. For instance, cancer cells: · Grow in the absence of signals telling them to grow. Normal cells only grow when they receive such signals.  · Ignore signals that normally tell cells to stop dividing or to die (a process known as programmed cell death, or apoptosis. · Invade into nearby areas and spread to other areas of the body. Normal cells stop growing when they encounter other cells, and most normal cells do not move around the body.  · Tell blood vessels to grow towards tumours and refresh these tumours with oxygen.   · Hide from the immune system.  · Rely on different kinds of nutrients than normal cells. Many times, cancer cells rely so heavily on these abnormal behaviours that they can’t survive without them. Researchers have taken advantage of this fact, developing therapies that target the abnormal features of cancer cells. https://www.cancer.gov/about-cancer/understandingwhat-is-cancer    

2.2 Daar is twee stelsels in die prentjie waar die ketel in die muur ingeprop word. Identifiseer hierdie twee stelsels. (2)   Regsklik op die blou knoppie en maak die prentjie oop in n nuwe “tab”    

1.3.5  Die hoogspringer het die meeste potensiële energie bo-aan haar sprong. (2)   Regsklik op die blou knoppie en maak die prentjie oop in n nuwe “tab”    

  QUESTION 1   1.1 Give the correct biological term for each of the following descriptions. Type only one word per textbox – start each word with a capital letter.   1.1.1 The process whereby cells divide in order to produce identical copies of the parent cell, thereby resulting in the growth of the organism. (1)     1.1.2 Any substance or agent that causes cancer. (1)     1.1.3 The type of meristematic tissue that is responsible for increasing the thickness in stems. (1)     1.1.4 The main body of the neuron that the electrical impulse flows along. (1)     1.1.5 The type of connective tissue that is usually found between bones or joints. (1)    

2.4.5 D (2)

2.4.2 B (2)

2.3.3 Aan die regterkant, watter skiër sal die grootste gravitasionele potensiële energie hê – die geel skier of die blou skiër? (2)

2.4.2 B (2)

SECTION A: 30