Seeds A 58-64. How do seed plants differ? ► Seeds contains an undeveloped plant and stored food for the young plant Include: grass, trees, shrubs,

SeedsSeedsA 58-64A 58-64

How do seed plants differ?How do seed plants differ?►SeedsSeeds contains an undeveloped plant contains an undeveloped plant

and stored food for the young plantand stored food for the young plant Include: grass, trees, shrubs, and bushesInclude: grass, trees, shrubs, and bushes

►AngiospermsAngiosperms produce flowersproduce flowers►GymnospermsGymnosperms do not produce flowers do not produce flowers►““Angi” is a girl and she likes flowers; Angi” is a girl and she likes flowers;

“Gym” is a boy and he does not like “Gym” is a boy and he does not like flowers.flowers.

►First angiosperm appeared 150 million First angiosperm appeared 150 million years agoyears ago Fruits, vegetables, and grains are Fruits, vegetables, and grains are

angiospermsangiosperms►Gymnosperms are the oldest seed Gymnosperms are the oldest seed

plants plants Include pine, fir, cedar, and spruce treesInclude pine, fir, cedar, and spruce trees Appeared about 250 million years agoAppeared about 250 million years ago

►Gymnosperms are divided into 4 Gymnosperms are divided into 4 sectionssections Conifers, cycads, ginkgoes, and gnetophytesConifers, cycads, ginkgoes, and gnetophytes

►Most gymnosperms are evergreensMost gymnosperms are evergreens they only lose a few leaves at a time they only lose a few leaves at a time and constantly replace them and constantly replace them

►Others are deciduousOthers are deciduous lose all of their lose all of their leaves in the fallleaves in the fall

What are angiosperms?What are angiosperms?►most recently evolved most recently evolved ►Best-adapted division of seed plantsBest-adapted division of seed plants►About 235, 000 different kinds (largest About 235, 000 different kinds (largest

division of the plant kingdom)division of the plant kingdom)►Live in all climates; in all parts of the worldLive in all climates; in all parts of the world►A few cannot live on their ownA few cannot live on their own

they have little or no chlorophyll they have little or no chlorophyll are parasitesare parasites

What are cotyledons?What are cotyledons?►Angiosperms are divided into 2 classes Angiosperms are divided into 2 classes

based on the number of based on the number of cotyledonscotyledons (a (a tiny leaf like structure inside a seed)tiny leaf like structure inside a seed)

►MonocotMonocot contains only one cotyledoncontains only one cotyledon Over 60,000 different kindsOver 60,000 different kinds Corn, rice, wheat, orchidsCorn, rice, wheat, orchids

►DicotsDicots contains two cotyledons contains two cotyledons over 170,000 kinds of dicotsover 170,000 kinds of dicots Bean plants, maple trees, rose plantsBean plants, maple trees, rose plants

Why do flowers have Why do flowers have aromas?aromas?

►The aroma of a flower helps it to The aroma of a flower helps it to survivesurvive Some smell nice which attracts insects; Some smell nice which attracts insects;

the insects pick up pollen and as they the insects pick up pollen and as they move from flower to flower they drop off move from flower to flower they drop off and pick up pollen which and pick up pollen which pollinatespollinates the the flowers so they can reproduceflowers so they can reproduce

Jack-in-the Pulpit flower