Flowers

Function – attract pollinators to aid in reproduction

Parts of a flower Sepals - modified leaves that protect the bud - often green

Parts of a flower Petals - broad and flat - very colorful

Parts of a flower Pistil – female reproductive structure – center

Parts of the Pistil - stigma – top of the pistil, sticky to collect pollen stigma

Parts of the Pistil - style – long, slender part of pistil style

Parts of the Pistil - ovary – base of the pistil, develops into a fruit ovary

Parts of a flower Stamen – male reproductive structure

Parts of the Stamen anther – saclike structures that produce pollen

Parts of the Stamen filament – thick stalk, holds up anthers filament

Review anther stigma style filament ovary petal sepal

Vascular Tissue

Xylem Transports water and minerals up the plant One way only

Xylem Large inside straws Made of thick dead cells

Xylem

Phloem Transports food molecules to all parts of the plant Two way

Phloem Smaller outside vessels Made of living cells

Plant Processes

Photosynthesis – process plants use to make their own food

Takes place… In the chloroplasts of leaf cells

Photosynthesis Carbon dioxide + water + light = glucose + oxygen

___CO2 + ___H2O + light = C₆H₁₂O₆ + ___O2 Balance the Equation! Photosynthesis ___CO2 + ___H2O + light = C₆H₁₂O₆ + ___O2 Balance the Equation!

Transpiration – water vapor leaving the leaves

Transpiration Water exits through the stoma

Transpiration Roots reabsorb water to replace water lost through leaves

Plant Tropisms Tropism – plant growth in response to a stimulus

Positive tropism – grow toward a stimulus

Negative tropism – grow away from a stimulus

Phototropism Response to light

Gravitropism Response to gravity

Thigmotropism Response to touch

Not really a tropism because it is short term and reversible

Phototropism, Gravitropism, Thigmotropism?

Phototropism, Gravitropism, Thigmotropism?

Phototropism, Gravitropism, Thigmotropism?

Phototropism, Gravitropism, Thigmotropism?

Seasons and Leaf loss

evergreen trees – do not lose all their leaves at once

slowly shed all year long

deciduous trees – lose all their leaves around the same time each year

Annuals – lives, reproduces, and dies in one year Examples: peas, corn, garden flowers

Biennials – completes it’s life cycle in 2 years Examples: carrots, beats, pansies

Perennials – continues to grow year after year Examples: trees, tulips