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Questions and Answers
What is a distinguishing factor between sexual and asexual reproduction?
How does fertilization in flowering plants lead to seed and fruit formation?
Which condition is necessary for seed germination?
What role does oestrogen play in the menstrual cycle?
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How is the developing embryo protected within the uterus?
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Which example illustrates a natural method of asexual reproduction in plants?
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Study Notes
Reproduction
- Sexual reproduction involves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo
- Asexual reproduction occurs without the fusion of gametes
Flowering Plants
- Insect-pollinated flowers have structures adapted for attraction, such as colorful petals, nectar, and fragrance
- Wind-pollinated flowers have structures adapted for wind pollination, such as large amounts of pollen and sticky stigma
- Pollen tube growth followed by fertilization leads to seed and fruit formation
- Seed germination requires specific conditions, which can be investigated practically
- Germinating seeds utilize food reserves until the seedling can carry out photosynthesis
- Asexual reproduction in plants can occur naturally through runners and artificially through cuttings
Humans
- The male reproductive system is adapted for sperm production and transportation
- The female reproductive system is adapted for egg production, fertilization, and embryo development
- Oestrogen and progesterone regulate the menstrual cycle
- FSH and LH hormones regulate the menstrual cycle
- The placenta provides nutrients and oxygen to the developing embryo
- Amniotic fluid protects the developing embryo
- Oestrogen and testosterone regulate the development of secondary sexual characteristics
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Description
Test your understanding of sexual and asexual reproduction, fertilization, and the structures of insect-pollinated and wind-pollinated flowers.
