16.3. Sexual reproduction in plants
A subsection of Biology, 0610, through 16. Reproduction
Listing 10 of 316 questions
shows a diagram of two flowers from different plants of the same species. Describe what is meant by the term species. Complete the diagram in to show self‑pollination and cross‑pollination by: • drawing one arrow to show the pathway of pollen during self‑pollination and labelling this arrow self‑pollination • drawing one arrow to show the pathway of pollen during cross‑pollination and labelling this arrow cross‑pollination • labelling the names of the structures involved in pollination. X Y State the function of the parts labelled X and Y in . X Y Explain why self‑pollination that results in production of offspring is a form of sexual reproduction and not asexual reproduction. State the type of environmental conditions that hydrophytes are adapted to live in.
0610_w24_qp_42
THEORY
2024
Paper 4, Variant 2
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Many flowering plants can reproduce sexually and asexually. Define the term asexual reproduction. State one advantage and one disadvantage of asexual reproduction for flowering plants. advantage disadvantage shows a potato plant, Solanum tuberosum, grown from a tuber. The tubers that potato plants are grown from are commonly referred to as seed potatoes. IORZHU VWHP XQGHUJURXQG VWHP \RXQJ WXEHU ROGVHHG SRWDWR URRWV WXEHU GHYHORSLQJ WXEHU Define the term growth. Potatoes can reproduce asexually by means of tubers. The parent plant produces underground stems, which eventually form tubers. With reference to , describe how tubers are formed from the underground stems in potatoes. A student conducted an experiment to investigate the percentage change in mass of potato tuber tissue when placed in different concentrations of sucrose solution. The potato tuber tissue was cut into cubes of the same size. shows a graph of the results. 0.0 -40 concentration of sucrose solution / mol dm-3 percentage change in mass -30 -20 -10 0.2 0.4 0.6 0.8 1.0 1.2 Use to predict the percentage change in mass of a cube of potato tuber tissue placed in 1.2 mol dm–3 sucrose solution. Explain the results shown in in terms of water potential: • between sucrose concentrations of 0.0 – 0.4 mol dm–3 • at sucrose concentration 0.4 mol dm–3 • between sucrose concentrations of 0.4 – 1.0 mol dm–3. between 0.0 – 0.4 mol dm–3 at 0.4 mol dm–3 between 0.4 – 1.0 mol dm–3 Pollination is the transfer of pollen from the anther to the stigma. Pollen can be transferred to the stigma by being carried by the wind or by animals. shows a photograph of a wind-pollinated flowering plant. State two structural adaptations of a flower for wind-pollination. State how self-pollination differs from cross-pollination. Suggest one reason why self-pollination might be advantageous to a population of plants.
0610_m15_qp_32
THEORY
2015
Paper 3, Variant 2
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Questions Discovered
316