Biology Flowers Notes Structure and Diversity | Winston-Salem Forsyth County Schools

University:
Winston-Salem Forsyth County Schools
Course:
AP Biology
Academic year:

2023
Views:

171

Pages:

4
Author:

Jihan Aviran

This Document has been modified with Flexcil app (iOS) https://www.flexcil.com Flowers: Structure and Diversity Introduction Flowers are the most attractive part of a plant They add colour beauty and fragrance to dur surmounding it the reproductive part of a plant Most flowers develop into fruits that contain seeds, which grow into new plants Interesting fact Some plants, like jasmine, have clusters of flowers cinflorescence). Others like rubiscusS and rose bear single flowers Diversity of Flowers Flowers differ in: - Colour - Fragrance - Size and shape - Number of petals - Arrangement Flexcil - The Smart Study Toolkit & PDF, Annotate, Note This Document has been modified with Flexcil app (iOS) https://www.flexcil.com Did you know? The world's largest single flower is Rafflesia amoldi, nearty 1 metre wide! Parts of a Flower and heir Functions Every complete flower has four main parts arranged in whoris. (Example: Hibiscus) Fun fact: The colour and smell of petals help in pollination by bees, butterflies, and birds. Male and Female Parts of a Flower ▪Androecium - The Male Part Made up of stamens. Each stamen has two parts: Antherproduces yellow pollen grains (male cells). Flexcil - The Smart Study Toolkit & PDF, Annotate, Note This Document has been modified with Flexcil app (iOS) https://www.flexcil.com Filament holds the anther upright Pollen grains are very light and can be easily carried by wind or insects ▪Gynoecium - The Female Part Consists of one or more carpels (pistils). Each carpel has three parts: To Stigma-sticky surface that receives pollen, Style-tube that connects stigma and ovary. Ovary-contains ovules, which become seeds after fertilisation. Types of flowers ▪Bisexual (Perfect) flowers: Have both male (stamens) and female (carpels) parts in the same flower Examete: Hibiscus, Mustard, etc. ▪Unisexual (Imperfect) flowers: Have either male or female parts, not both Male flower oily stamens Female flower only carpels Example: Papaya, Cucumber, etc Flexcil - The Smart Study Toolkit & PDF, Annotate, Note This Document has been modified with Flexcil app (iOS) https://www.flexcil.com Types of PlantsBased on Flower Distribution: ▪Monoecious plantar Male and female flowers are on the same plant Example: Maize, Cucurbits (like pumpkin), etc. ▪Dioecious plants: Male and fernale flowers are on different plants Example: Papaya, Date palm, etc. Flexcil - The Smart Study Toolkit & PDF, Annotate, Note