After the great job on the herbarium we finish our section on plants with seed plants.
How do angiosperms and gymnosperms reproduce?
How does each differ from how spore producing plants reproduce?
If spores still work, why would fossil records show a change to seeds and then further to flowers and fruit?
Contract week 6 has you back outside looking for flowers, fruits and seeds or looking at how we use plants in our daily lives.
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Angiosperms use pollination to reproduce.
Gymnosperms use seeds to reproduce.
Seeds, flowers, and fruit are more advanced and more protected than spores. They can travel further through wind, water,sticking to things, and being eaten and later dropped off in places by animals they can go longer distances. They can go further from their parent plant and do not need to live in water. Fruit can also have multiple seeds so that makes more plants.
THis is how gymnosperms and and angiosperms reproduce!!!!!!!!
Gymnosperms are the non-flowering seed plants such as cedar, pine, redwood, hemlock, and firs. Gymnosperms are woody plants that release seeds. Pollen is carried by wind to the "egg" where the growth of the pollen tubes through this tissue brings the sperm to the egg. Gymnosperms are usually a large size with much growth, the leaves are usually evergreen, needles or scales.
Angiosperms have flowers and release seeds inside a protective covering called a fruit. Angiosperms are dominant types of plants. Angiosperms aredivided into monocots and dicots. Monocots are one seeded leafs. Dicots are two seeded leafs. There are at least 250,000 species of angiosperms. They range from small flowers to large wood trees. Pollination is done by wind, insects, and other animals. The male part is the pollen grain, and the female part is the ovary. The ovary goes through meiosis to produce an "egg", which is them fertilized by the "sperm" carried by the pollen. The sperm of the male part travels down the pollen tube in the style. Two sperm enter the micropyle of the ovary. After the process of mitosis, it turns into a seed with an embryo. The seed may be inside a fruit.
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