Presentation on theme: "Flower Structure and Function"— 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?Diversityis variationwithin a community.
2 Take in CO2, make glucose, release O2. Main Plant PartsAngiosperms are made up of 6 parts:3 main parts:1. Roots--Stabilizes the plant below ground, absorbs water and nutrients from the soil.Fibrous root system--TreesTap root system--Cactus, Carrots2. Stems--Stabilizes the plant above ground and allows plant to grow higher and wider.Woody stems--Trees, RosesHerbaceous stems--Grass, Flowers3. Leaves--Act as food factories of the plant.Take in CO2, make glucose, release O2.Waxy coat to prevent water loss--Cuticle
3 4. Flowers-- 5. Seeds-- 6. Fruit-- Contain angiosperms reproductive parts.5. Seeds--Part of flowering plant thatcontains anembryo (young plant)and the food (cotyledon)it will need to grow intoa new plant.6. Fruit--Ripened ovary of a flowering plant that contains the seeds. Can be dry or fleshy
4 Reproduction in Angiosperms Flowers are the reproductive structures of angiosperms.Some have male reproductive partsOthers have female reproductive partsSome have both--male & female partsMALE FLOWER PARTSAntherSTAMENFilamentPOLLEN--Powder containing male sperm
5 PISTIL FEMALE FLOWER PARTS Stigma Style Ovary Sticky, pollen lands hereStyleOvaryHollow structure at bottom of pistil,contains female egg cell.
7 PollinationProcess of getting pollen (sperm) of a plant to the egg—may be the same plant/may be another plant.Things that attract pollinators:ColorAroma (Smell)ShapeSizePollinators:Organisms that carry pollenfrom stamens to pistils.Examples: insects, like honeybees,butterflies, moths, birds,and mammals, like bats.
8 How Does Pollination Occur? Flowers provide foodNECTARPollen then "sticks" pollinatorPollinator moves to feed onanother flower, pollen grains fall offanimal's body onto pistil ofvisited flower.Flowers have different colors,shapes, sizes, and fragrances toattract different pollinators.Examples:Butterflies--long, slender tongues topollinate long, narrow flowers.Bees--open, shallow flowers
9 Inside the fruit--the seeds FertilizationPollen travels down—thru the style into the ovary to fertilize female egg.EMBRYOfertilized egg--embryo--SEEDRipened Ovary develops into aFRUITFruit protects newlyfertilized egg.Inside the fruit--the seedsthat can develop intonew plants.Some fruits—1 seed--peachesOthers—Many seeds--apples
10 Are those fruits or veggies? Foods we call vegetables areactually fruits: tomatoes,cucumbers, squash, zucchini, and peppers.Why???
11 How are seeds sent out or dispersed Seed DispersalHow are seeds sent out or dispersedinto the environment?Animals, water, wind,hooks on certainseeds (cuckleburr)How do angiosperms andanimals help oneanother?Seed lands—conditions right--GERMINATIONSprouting
12 Number 1-4 somewhere on your notes!! Quiz Time !!!!!!!!How well did you listen and take notes?Number 1-4 somewhere on your notes!!
13 1. Some leaves and fruit possess a waxy coat 1. Some leaves and fruit possess a waxy coat. What is most likely the purpose of this coating?A. It traps insectsB. It traps sunlightC. It prevents water lossD. It looks shiny
14 2. Roots that grow underground are important for a plant's survival 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. Reproduction2. Respiration3. Defense4. Photosynthesis
16 4. Pollinators, such as birds and insects, are very important to flowering plants. What is the most important job thatthey 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.