Give a brief account of the role of each of the following in flowering plant reproduction - Leaving Cert Biology - Question 14 - 2012
Question 14
Give a brief account of the role of each of the following in flowering plant reproduction.
1. Petal.
2. Anther.
3. Stigma.
(ii) Name one structure through which th... show full transcript
Worked Solution & Example Answer:Give a brief account of the role of each of the following in flowering plant reproduction - Leaving Cert Biology - Question 14 - 2012
Step 1
1. Petal.
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Answer
Petals play a vital role in flowering plant reproduction by attracting insects and other pollinators to the flower, which aids in the transfer of pollen.
Step 2
2. Anther.
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Answer
The anther is responsible for the manufacture and release of pollen grains, which can then be transferred to the female parts of the flower during pollination.
Step 3
3. Stigma.
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Answer
The stigma is the receptive surface where pollen lands, allowing for the pollen to stick and germinate, leading to fertilization.
Step 4
Name one structure through which the pollen tube grows in order to reach the embryo sac.
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Answer
The pollen tube grows through the stigma or style to reach the embryo sac for fertilization.
Step 5
What type of division takes place?
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Answer
Mitosis takes place within the pollen tube to divide the generative nucleus.
Step 6
With what does each male gamete fuse in the embryo sac?
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Each male gamete fuses with an egg cell (female gamete) in the embryo sac.
Step 7
Name the product of each fusion.
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The products of the fusions are a zygote (from the fusion with the egg) and endosperm (from the fusion with the polar nuclei).
Step 8
Name any one of these structures.
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Answer
The food store develops in either the endosperm or cotyledon (seed leaf or embryonic leaf).
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