Kingdom PlantaeSeed Plants

Mr. SkirbstLife Science

Topic 15

Seed Plants

Seed Plants- Do not require standing water

to reproduce

Seed Plants- Do not require standing water

to reproduce- Encase young plants to protect

& feed

Seed StructureConsists of:1- seed coat

2- young plant(embryo)

3- stored food(cotyledon)

CotyledonMonocot – one cotyledon

Dicot – two cotyledons

Reproductive Structuresovule -

Reproductive Structuresovule – female structure

containing egg cells

pollen -

Reproductive Structuresovule – female structure

containing egg cells

pollen – male structure containing sperm cells

(often with spikes on surface)

Types of Plantsgymnosperms -

Types of Plantsgymnosperms – “naked” seeds

(not covered by ovary)

Types of Plantsgymnosperms – “naked” seeds

(not covered by ovary)cones – location of reproductive structure(ex. Pine trees)

Types of Plantsangiosperms– seed contained in

“vessel”(seeds covered by ovary)

Types of Plantsangiosperms– seed contained in

“vessel”(seeds covered by ovary)flowers – location of reproductive structures(a.k.a. flowering plants)

Gymnosperms4 phyla:

Gymnosperms4 phyla:

1- cycads – tropical, palmlike

Gymnosperms4 phyla:

1- cycads – tropical, palmlike2- ginkoes – ornamental (seeds stink!)

Gymnosperms4 phyla:

1- cycads – tropical, palmlike2- ginkoes – ornamental3- conifers – cone-bearing, evergreen (like pine)

Gymnosperms4 phyla:

1- cycads – tropical, palmlike2- ginkoes – ornamental3- conifers – cone-bearing4- gnetophytes – blended characteristics of gymno & angiosperms

Angiosperms- Largest plant group in the

world

Angiosperms- Largest plant group in the

world- Also called “flowering” plants

Flowers- Contain the reproductive

organs

Flowers- Stamen (male)

Flowers- Pistil (female)

Tropism- A plant’s response to a stimulus

Tropism- A plant’s response to a stimulus

Response – a reaction to a stimulus

Tropism- A plant’s response to a stimulus

Response – a reaction to a stimulus

Stimulus – something causing a reaction

2 Types of Tropism1- Phototropism -

2 Types of Tropism1- Phototropism – a plant’s

response to light

2 Types of Tropism2- Gravitropism -

2 Types of Tropism2- Gravitropism – a plant’s

response to gravity

TropismPositive tropism – response

toward a stimulus

TropismPositive tropism – response

toward a stimulusNegative tropism – response

away from a stimulus