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Flower Structure and Function Flowering plants are called ANGIOSPERMS. They are the greatest number of plants on Earth. What helps them survive? Diversity.

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Presentation on theme: "Flower Structure and Function Flowering plants are called ANGIOSPERMS. They are the greatest number of plants on Earth. What helps them survive? Diversity."— Presentation transcript:

1 Flower Structure and Function Flowering plants are called ANGIOSPERMS. They are the greatest number of plants on Earth. What helps them survive? Diversity ! What is diversity? Diversity is variation within a community.

2 Main Plant Parts Angiosperms are made up of 6 parts: Stabilizes the plant below ground, absorbs water and nutrients from the soil. Stabilizes the plant above ground and allows plant to grow higher and wider. Act as food factories of the plant. Take in CO 2, make glucose, release O 2. Waxy coat to prevent water loss-- 3 main parts: 1. Roots-- 2. Stems-- 3. Leaves-- Fibrous root system--Trees Tap root system--Cactus, Carrots Woody stems--Trees, RosesHerbaceous stems-- Grass, Flowers Cuticle

3 Ripened ovary of a flowering plant that contains the seeds. Can be dry or fleshy Part of flowering plant that contains an embryo (young plant) and the food (cotyledon) it will need to grow into a new plant. Contain angiosperms reproductive parts. 4. Flowers-- 5. Seeds-- 6. Fruit--

4 Reproduction in Angiosperms Flowers are the reproductive structures of angiosperms. Some have male reproductive parts Others have female reproductive parts Some have both-- male & female parts MALE FLOWER PARTS STAMEN Anther Filament POLLEN-- Powder containing male sperm

5 Hollow structure at bottom of pistil, contains female egg cell. FEMALE FLOWER PARTS Stigma Style Ovary PISTILPISTIL Sticky, pollen lands here

6 Flower Parts

7 Pollination Process of getting pollen (sperm) of a plant to the egg may be the same plant/may be another plant. Color Aroma (Smell) Organisms that carry pollen from stamens to pistils. Examples: insects, like honeybees, butterflies, moths, birds, and mammals, like bats. Things that attract pollinators: Pollinators: Shape Size

8 How Does Pollination Occur? Flowers provide food Pollen then "sticks" pollinator Pollinator moves to feed on another flower, pollen grains fall off animal's body onto pistil of visited flower. Flowers have different colors, shapes, sizes, and fragrances to attract different pollinators. Butterflies--long, slender tongues to pollinate long, narrow flowers. Bees--open, shallow flowers NECTAR Examples:

9 Fertilization Pollen travels downthru the style into the ovary to fertilize female egg. Fruit protects newly fertilized egg. Inside the fruit--the seeds that can develop into new plants. fertilized egg-- EMBRYO embryo-- SEED Ripened Ovary develops into a FRUIT Some fruits1 seed--peaches OthersMany seeds--apples

10 Are those fruits or veggies? Foods we call vegetables are actually fruits: tomatoes, cucumbers, squash, zucchini, and peppers. Why???

11 Seed Dispersal How are seeds sent out or dispersed into the environment? Animals, water, wind, hooks on certain seeds (cuckleburr) How do angiosperms and animals help one another? Seed landsconditions right-- GERMINATION Sprouting

12 Quiz Time !!!!!!!! Quiz Time !!!!!!!! How well did you listen and take notes? How well did you listen and take notes? Number 1-4 somewhere on your notes!! Number 1-4 somewhere on your notes!!

13 1. Some leaves and fruit possess a waxy coat. What is most likely the purpose of this coating? A. It traps insects B. It traps sunlight C. It prevents water loss D. It looks shiny

14 2. Roots that grow underground are important for a plant's survival. Which statement best describes their job? A. They absorb water and nutrients. B. They produce food. C. They contain the seeds for reproduction. D. They work to scare off underground predators.

15 3. Milkweed is a plant that secretes a milky substance poisonous to insects. What is the most likely advantage of this characteristic? 1. Reproduction 2. Respiration 3. Defense 4. Photosynthesis

16 4. Pollinators, such as birds and insects, are very important to flowering plants. What is the most important job that they perform? 1. They bring food to the plant. 2. They scare off predators. 3. They bring water to the plant. 4. They help plants reproduce.


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