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Questions and Answers
What is the direct result of pollen falling on the stigma of a plant?
What is the direct result of pollen falling on the stigma of a plant?
- The formation of the embryo sac begins.
- A haploid zygote can form.
- A diploid zygote can form. (correct)
- An egg cell is immediately formed.
Which of these agents directly contributes to self-fertilization?
Which of these agents directly contributes to self-fertilization?
- Insects
- Wind (correct)
- Water
- Birds
What is the difference between direct and indirect pollination?
What is the difference between direct and indirect pollination?
- Direct pollination is more efficient than indirect pollination.
- Indirect pollination allows for increased diversity in offspring compared to direct pollination.
- Direct pollination results in genetically similar offspring, while indirect pollination creates genetic diversity.
- Direct pollination is more likely to result in self-fertilization, while indirect pollination is less likely. (correct)
How many haploid cells are formed during the meiosis of an ovule cell?
How many haploid cells are formed during the meiosis of an ovule cell?
What is the function of the polar nuclei in the embryo sac?
What is the function of the polar nuclei in the embryo sac?
Flashcards
Pistil
Pistil
The female reproductive part of a flower, consisting of stigmas, styles, and ovaries.
Ovule
Ovule
A structure within the ovary containing a cell that undergoes meiosis to form haploid cells.
Meiosis in Ovule
Meiosis in Ovule
A process producing four haploid cells from a single ovule cell, with one maturing into the embryo sac.
Direct Pollination
Direct Pollination
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Indirect Pollination
Indirect Pollination
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Study Notes
Reproduction in Plants
- Pistils are composed of stigmas, styles, and ovaries containing one or more ovules
- Meiosis in an ovule produces four haploid cells
- One haploid cell undergoes three further divisions to form the embryo sac, containing an egg cell (oosphere) and polar nuclei
- Pollen must be transported to the stigma for fertilization
- Direct pollination occurs when pollen from a flower lands on the stigma of the same flower
- Indirect pollination occurs between different plants
- Agents of direct pollination include wind, gravity, and self-pollination (in plants)
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