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Questions and Answers
What is self pollination?
Self pollination is when the pollen is dropped from the stigma to the anther of the same flower.
What is cross pollination?
Cross pollination is when the pollen of a different flower is transferred to the stigma.
Define fertilization in plants.
Fertilization is the fusion of the male gamete and the female gamete.
What is the structure of a seed?
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Explain what happens when a seed germinates.
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Define fertilization.
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What is self pollination?
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What are the three parts of most seeds? Embryo, Endosperm, and ______.
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Self pollination creates more variation in the offspring.
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What process occurs after pollination to lead to seed formation?
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Describe what happens when a seed germinates.
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Study Notes
The Process of Pollination
- Insects inadvertently pollinate flowers by transferring pollen from one flower to another while collecting nectar or pollen.
- Pollination occurs when pollen from the anther of one flower is deposited onto the stigma of another flower.
Self and Cross Pollination
- Self pollination: pollen is transferred within the same flower or plant, resulting in limited genetic variation.
- Cross pollination: pollen is transferred between flowers of the same species, promoting greater genetic variation in offspring.
Fertilization
- Fertilization: the fusion of male and female gametes.
Seed Formation
- After pollination, the pollen grain travels through the pollen tube and fertilizes the ovule, developing into a seed.
Seed Structure
- Seeds consist of three main parts:
- Embryo
- Endosperm
- Coating
Seed Germination
- Water and oxygen penetrate the seed coat, causing embryo cells to enlarge and eventually break through the seed coat.
- A root (radicle) emerges, marking the beginning of seed germination.
The Process of Pollination
- Insects inadvertently pollinate flowers by transferring pollen from one flower to another while collecting nectar or pollen.
- Pollination occurs when pollen from the anther of one flower is deposited onto the stigma of another flower.
Self and Cross Pollination
- Self pollination: pollen is transferred within the same flower or plant, resulting in limited genetic variation.
- Cross pollination: pollen is transferred between flowers of the same species, promoting greater genetic variation in offspring.
Fertilization
- Fertilization: the fusion of male and female gametes.
Seed Formation
- After pollination, the pollen grain travels through the pollen tube and fertilizes the ovule, developing into a seed.
Seed Structure
- Seeds consist of three main parts:
- Embryo
- Endosperm
- Coating
Seed Germination
- Water and oxygen penetrate the seed coat, causing embryo cells to enlarge and eventually break through the seed coat.
- A root (radicle) emerges, marking the beginning of seed germination.
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Description
This quiz covers the process of pollination, including how insects unintentionally pollinate flowers, cross-pollination, and self-pollination. Learn about the role of anther, stigma, and pollen in plant reproduction.
