What are micronutrients?
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iii) How is cross pollination better than self pollination?
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iv) What is chlorophyll?
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v) What is palpitation?
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Question 4
a) Answer the questions based on the given figure:

i) Label the parts 1 to 4 *
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ii) What is the function of part 2?
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iii) Where is this structure found?
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iv) Where is higher concentration found, inside or outside of part 2?
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b. Give reasons for the following:
i) Increase in temperature increases transpiration *
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ii) Flowers pollinated by wind produce large number of pollens
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iii) Roots of a plant are typically non green
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iv) Backflow of blood from ventricle to atrium does not happen
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v) Person with blood group ‘O’ is called universal donor
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Answer:
- Micronutrients are essential elements required by organisms in varying quantities throughout life to orchestrate a range of physiological functions to maintain health
- Cross pollination is advantageous because it allows for diversity in the species, as the genetic information of different plants are combined. ... Self pollination leads to more uniform progeny, meaning that the species is, for example, less resistant as a whole to disease.
- the green substance in plants that takes in light from the sun to help them grow
- A sensation that the heart is racing, pounding, fluttering or skipping a beat, often bothersome, but hardly ever a sign of heart disease
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