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0610_s20_qp_31
A paper of Biology, 0610
Questions:
9
Year:
2020
Paper:
3
Variant:
1
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1
shows some of the structures involved in excretion. Complete by labelling the structures in the spaces provided. Choose structures from the list: bladder bronchus heart liver lung pancreas trachea ureter urethra Urea is excreted. State the name of the substance that urea is made from. State where in the body urea is made. Urine produced by the kidneys contains three excretory substances: urea, water and mineral salts. Table 1.1 shows the average mass of urea, water and mineral salts in 100 g of blood plasma and in 100 g of urine. Table 1.1 substance average mass / g in 100 g of blood plasma in 100 g of urine water urea mineral salts 90.00 0.03 0.69 95.00 2.00 1.35 Calculate the percentage increase in the average mass of mineral salts between blood plasma and urine. Give your answer to two decimal places. Space for working. % Describe the process that produces the carbon dioxide that is excreted by the lungs. State the name of the component of blood that transports carbon dioxide to the lungs.
13. Excretion in humans  →  13.1. Excretion in humans
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2
shows an image of two sperm cells. State two adaptive features of sperm. Describe the process of fertilisation. shows a fetus during development. A B C F E D Complete Table 2.1 by stating: • the missing letters from • the missing name of the structure • one function for structures C, A and F during pregnancy or birth. Table 2.1 letter on name of the structure one function C amniotic fluid dilates during birth A placenta F umbilical cord uterus wall contracts during birth
16. Reproduction  →  16.4. Sexual reproduction in humans
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3
Complete the sentences about genetic engineering. Use words from the list. Each word may be used once, more than once, or not at all. adding bacteria crops family insects minerals organism removing viruses vitamin weeds In genetic engineering the genetic material of an is changed by , changing or inserting individual genes. An example of this is inserting a human gene into so that they produce human insulin. Crop plants have genes inserted into them to make them resistant to herbicides. Herbicides kill . Crop plants can also be genetically engineered by inserting a gene so that they produce a which is a nutrient needed by humans in very small amounts.
21. Biotechnology and genetic modification  →  21.3. Genetic modification
21. Biotechnology and genetic modification  →  21.1. Biotechnology and genetic modification
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4
shows a photomicrograph of a cross-section of part of a leaf. C B A Identify tissue A on and state the name and function of this tissue. name function Structure C in is part of the transport system in the leaf. State the names of two tissues that structure C contains. Identify and state the name of cell B in . A plant is in bright sunlight and has plenty of water. Gases move into and out of its leaves. Complete Table 4.1 to show the net direction of movement for the named gases. Place a tick (3) in each correct box. Table 4.1 name of gas moves into leaves moves out of leaves carbon dioxide oxygen water vapour
6. Plant nutrition  →  6.2. Leaf structure
8. Transport in plants  →  8.3. Transpiration
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5
shows the average number of cigarettes smoked per day by male and female smokers between 1974 and 2014 in one country. Cigarettes contain tobacco. 1974 1978 1982 1986 1990 1994 year 1998 2002 2006 2010 2014 average number of cigarettes smoked per day Key: female male State the average number of cigarettes smoked per day by female smokers in 1982. State a year in which male smokers smoked an average of 19 cigarettes per day. State two conclusions that can be made from the data shown in . Tar is a toxic component of tobacco smoke. State two effects of tar on the gas exchange system. State the names of two toxic components of tobacco smoke other than tar. Describe one effect on the fetus of the mother smoking tobacco during pregnancy.
11. Gas exchange in humans  →  11.1. Gas exchange in humans
16. Reproduction  →  16.4. Sexual reproduction in humans
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7
shows a tropical forest where the trees have been cut down. State the name of the type of habitat destruction shown in . Describe two reasons why humans destroy habitats such as tropical forests. is a graph showing the estimated area of trees that have been removed from tropical forests between 2001 and 2017. 60 000 70 000 80 000 90 000 100 000 110 000 120 000 130 000 140 000 150 000 160 000 170 000 180 000 2001 2002 2003 2004 2005 2006 2007 2008 2009 year 2010 2011 2012 2013 2014 2015 2016 2017 estimated area of trees removed from tropical forests / km2 State the year which had the lowest estimated area of trees removed from tropical forests on . State the area of trees removed in 2012 on . km2 A student made three statements about the data in : 1 The number of trees cut down increases every year. 2 The number of trees cut down in 2014 was three times more than the number of trees cut down in 2003. 3 Fewer trees were cut down in 2017 than in 2016. Complete Table 7.1 by using the data in to decide if each statement is true or false and state the evidence that supports your decision. Table 7.1 statement number true or false evidence from 1 shows pollution in a marine environment and shows pollution in a land environment. State the name of one source of pollution for each of the environments shown in and . marine land
20. Human influences on ecosystems  →  20.2. Habitat destruction
20. Human influences on ecosystems  →  20.4. Conservation
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8
is a diagram of a section of human skin. G F C D E State the names of the structures identified by the labels in . C D E F G Complete the sentences about temperature control in humans by writing the missing words in the gaps. If body temperature increases above normal, in the detect the rise in temperature and impulses are sent to the skin. Glands in the skin produce a liquid called . The main component of this liquid is water. The water in the liquid from the surface of the skin using heat energy from the body. This lowers the body temperature. The maintenance of a constant body temperature is an example of .
14. Coordination and response  →  14.4. Homeostasis
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