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Questions and Answers
What distinguishes cross-pollination from self-pollination?
What distinguishes cross-pollination from self-pollination?
- It requires water for the pollen to transport.
- It involves the same flower's anther and stigma.
- It occurs between different flowers. (correct)
- It relies solely on wind for pollen transfer.
Which feature is NOT typically found in flowers that are adapted for insect pollination?
Which feature is NOT typically found in flowers that are adapted for insect pollination?
- Strong scents.
- Heavy, coarse pollen grains. (correct)
- Presence of nectar.
- Bright coloration.
Which type of pollination does rice primarily utilize?
Which type of pollination does rice primarily utilize?
- Hybrid pollination involving both insect and wind.
- Cross-pollination through floral insects.
- Wind-pollination due to its height.
- Self-pollination where pollen remains on the same flower. (correct)
Why do wind-pollinated flowers tend to be less colorful?
Why do wind-pollinated flowers tend to be less colorful?
In which scenario would pollen from one flower reach the stigma of another flower?
In which scenario would pollen from one flower reach the stigma of another flower?
What is the primary role of the cotyledon in a seed?
What is the primary role of the cotyledon in a seed?
Which part of the plant is the first to emerge during germination?
Which part of the plant is the first to emerge during germination?
What does the embryo of a seed primarily consist of?
What does the embryo of a seed primarily consist of?
What is the function of the seed coat in a seed?
What is the function of the seed coat in a seed?
Which type of pollination occurs between flowers on the same plant?
Which type of pollination occurs between flowers on the same plant?
What is the main function of leaves in a plant?
What is the main function of leaves in a plant?
What is the function of pollen in plant reproduction?
What is the function of pollen in plant reproduction?
What is the role of nectar in flowers?
What is the role of nectar in flowers?
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Study Notes
Seed Structure and Function
- Seed coat protects the seed.
- Cotyledon stores food for the embryo.
- Embryo contains the baby plant, consisting of root, stem, and leaves.
Seed Germination
- Germination: Process of a seed sprouting and growing into a new plant.
- Requirements for germination:
- Suitable temperature.
- Oxygen.
- Water.
- Seed coat falls off during germination.
- Roots are the first part of the plant to emerge during germination and absorb water and minerals.
Photosynthesis
- Photosynthesis is the process performed by leaves to produce food for the plant.
Plant Reproduction
- Stamen is the male part of the flower.
- Anther produces pollen.
- Pistil is the female part of the flower.
- Pollen fertilizes the ovule.
Pollination
- Nectar attracts pollinators.
- Self-pollination occurs within the same flower.
- Cross-pollination involves pollen transfer from the anther of one flower to the stigma of a different flower.
Types of Pollination
- Flowers pollinated by insects:
- Brightly colored petals.
- Sweet scent.
- Produce nectar.
- Wind pollination:
- Less colorful petals.
- Light pollen grains.
- Rice plants typically undergo self-pollination.
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