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Lab 5

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Submitted By tawina
Words 362
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Title: Seed Plants 2: Angiosperms
Aim: To draw and label six diagrams related to flowering plants
Introduction: Angiosperms are flowering, fruit-bearing plants or trees known for having ovules (and therefore seeds) developed within a closed ovary.
Angiosperms are plants producing flowers. Thus, they are also commonly called as the flowering plants. They belong to the kingdom Plantae, subkingdom Embryophyta. They can be classified as monocotyledons and eudicotyledons.
Characteristics of Angiosperms * The flowers serve as the reproductive organs for the plant.(exchanging genetic information) * They have small pollen grains that spread genetic information from flower to flower. * They have stamens- reproductive structures found in flowers that produce the pollen grains that carry the genetic information. * They have much smaller female reproductive parts, allowing them to produce seeds more quickly. * They have carpel that encloses developing seeds that may turn into fruit. * A great disadvantage is the production of endosperm. It is a material that forms after fertilisation and serves as a highly nutritional food source to the developing seed and seedling.

The life cycle of Angiosperms
They follow: * Seed * Germination * Sprout or seedling * Mature plant * Flowering

Materials: * Flower for dissection (hibiscus flower) * Scalpel * Dissecting microscope * Prepared slide of young lily anther, c.s. * Prepared slide of mature lily anther (pollen grains), c.s. * Mature pollen * Glass slide * Coverslip * Compound microscope * 0.5% sucrose, in dropping bottle * Prepared slide of lily ovary, c.s megaspore mother cell * Compound microscope * Bean fruits * Soaked bean seeds * Iodine solution(I2KI), in a dropping bottle * Herbarium mount of Capsella, with fruits

Procedure: Refer to Biology lab manual, lab 5- pages 3-7.

Results:

Questions: 1. Gymnosperms | Angiosperms | | | a.cones | flowers | c.Bare, not enclosed; found on scales, leaves or as cones. | Enclosed inside an ovary, usually in a fruit. | b. seed | Endosperm |

2. Pollination is the act of transferring pollen from the male part of a flower to the female part of a flower. Fertilization occurs when the male gamete of any sexually reproducing organism combines with a female gamete to form a zygote. 3. A. receptacle
B.
c.ovary
D. filament
E. stigma 4. It is a monocotyledon. 5. A. anther pollen tetrad
B. pollen sacs

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