5090_w10_qp_21
A paper of Biology, 5090
Questions:
8
Year:
2010
Paper:
2
Variant:
1
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1
shows a flower very shortly after it has opened and shows the same flower when it is several days older. On , label a filament and a sepal. State two features of the flower in that could have attracted the insect. 1. 2. ………………………………………………………………. Using information in and explain why flowers of this plant are rarely self-pollinated suggest how the insect brings about pollination in this species of plant.
16. Development of organisms and continuity of life  →  16.3. Sexual reproduction in plants
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2
shows components of the faeces of a cow, an herbivorous mammal. fibre carbohydrate fat protein Name the component that makes up 75% of the faeces. Suggest what makes up a major part of the fibre in the faeces. If used as a fertiliser, faeces will eventually increase the nitrates in the soil. Identify the component in faeces that is responsible for this increase in nitrates and describe its conversion into nitrates. component how it is converted Explain why a mixture of faeces and urine is a better fertiliser than faeces alone.
19. Relationships of organisms with one another and with the environment  →  19.2. Nutrient cycles
6. Plant nutrition  →  6.3. Mineral nutrition
13. Excretion  →  13.2. Urinary system
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4
shows the blood groups of the members of two families. Family 1 Family 2 blood groups of parents : B and A O and B blood groups of children: A O AB B B AB B child number : x grandchild : The alleles responsible for blood groups are IA, IB and Io. State the term used to describe the relationship between alleles IA and IB. Identify, by number, which one of the children had been adopted by their family and could not be the genetic offspring of the parents. Explain your answer. child number explanation When children 4 and 5 grow up, they have a child of their own, child 8, as shown in . Using a genetic diagram, explain the possible genotypes and phenotypes of child 8.
17. Inheritance  →  17.3. Inheritance
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5
shows the rate of water uptake and of water loss for a plant over a 24-hour period. volume of water / cm3 per hour time of day water uptake water loss Key: Determine the rate of water uptake at 1200 hours. Name the cells through which water is absorbed from the soil. Name the cells between which water vapour passes to the atmosphere. State three uses of water within a plant between midnight and 0400 hours. 1. 2. 3. State two additional uses of water between 0800 and 1900 hours. 1. 2. Explain what may happen to the plant between 1400 and 1800 hours.
7. Transport in flowering plants  →  7.1. Uptake and transport of water and ions
3. Movement into and out of cells  →  3.1. Diffusion and osmosis
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