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Name the 3 structures within a plant cell that are absent from an animal cell and describe the function of these 3 structures. (6 marks)

Plant cells contain chloroplasts (1), a cell wall (1) and a permanent vacuole (1). These structures are absent from animal cells. Chloroplasts contain chlorophyll which absorb light energy for photosynthesis...
HL
Answered by Hannah L. • Biology tutor
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Describe how water moves from roots to leaves.

By the transpiration stream, in the xylem.The xylem is the tube in the plant in which water and solutes are transported from the plant roots to the stem and leaves. The xylem allows capillary action, which c...
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Answered by Rachel K. • Biology tutor
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Describe how starch is digested mechanically and chemically from the time we eat it in our mouth until it reaches our small intestine where it's absorbed.

The food firstly is mechanically digested in the mouth by the action of our teeth and tongue when we bite and churn it around. The saliva secreted in our mouth contains amylase which chemically breaks down t...
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Answered by Louise P. • Biology tutor
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Define the process of osmosis and diffusion

osmosis is the unprompted movement of water from a high concentration to a low concentration through a semi-permeable membrane diffusion is the movement of particles from an area of high concentration to an ...
Answered by • Biology tutor
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Explain how the carbon is recycled into the growth of new leaves

Microorganism decompose the lead leaves from the old tress. They break up the leaves and release the nutrient and carbon into the environment. the new leaves photosynthesis and use the Carbon that was broken...
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Answered by Glen C. • Biology tutor
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