Plant Reproduction 3.2 pages 66-69

Plant Parts: Male Pollen: Anther: Filament: Carries the plant sperm Where the pollen is made The stem of the anther

Plant Parts: Female Stigma: Style: Ovary: Ovules Sticky part where pollen lands. Tube that supports the stigma and carries sperm to the ovary. Contains the ovules. Each contains an egg. Pistil

Flowering Plants Largest most _____ group of plants. Flowering plants are called _________. Plants that do not flower such as pine trees are called __________. Flowering plants reproduce through _________ reproduction. diverse angiosperms gymnosperms sexual

Sexual Reproduction Sexual reproduction requires a ______ and an _____. In flowering plants these can be located: sperm egg On the same flower On the same plant but not on the same flower On different plants

The magic begins….. Pollination: Occurs when the pollen comes in contact with the stigma.

The magic continues: Fertilization: Occurs when the sperm joins with the egg. The pollen grain grows a long tube that carries the sperm down the style to the egg waiting in the ovary.

Making a Seed… Each _______ becomes a seed. The flower petals _______________. The _______ becomes the fruit. The fruit ripens and the seeds are ____________. Disperse: ovule die and fall away ovary dispersed To drive or send off in various directions; to scatter

Types of Dispersal Eaten: Hitchhike: Wind: Animals and birds can eat the fruit and then “deposit” the seeds in a nice pile of fertilizer. Some fruits are covered in barbs that attach to fur and clothing and the seed is carried away. Wind can carry a seed away from the parent plant.

From Seed to Plant Once the seed is mature it may become _________. How long can dormancy last? Breaking dormancy: dormant The oldest seed known to have germinated was 3,000 years old. Ideal conditions (water, sunlight, nutrients) Extreme conditions (freezing or fire)

Germination Under the right conditions a seed will germinate. Germinate: To begin to grow or develop. To sprout.

Asexual Reproduction Conditions aren’t always right for sexual reproduction so some flowering plants can reproduce asexually as well. Plantlets: Tubers: Runners Tiny plants that develop and fall off. Underground stems that produce new plants. Above ground stems that produce new plants.