Easy way to remember! Paint(purpose) Red(research) Houses(hypothesis) Even(experiment) After(analysis) Cloudy(conclusion) Days

ENDURING UNDERSTANDING Seeds are living organisms in a dormant state.Seeds are living organisms in a dormant state.

LEARNING GOAL I will dissect seeds to discover their structures.I will dissect seeds to discover their structures. I will observe germinating seeds to determine the sequence of developments and record the sequences.I will observe germinating seeds to determine the sequence of developments and record the sequences. I will use good lab procedures and data recording to investigate the early development of two groups of complex plants, monocots and dicots.I will use good lab procedures and data recording to investigate the early development of two groups of complex plants, monocots and dicots. I will investigate the effect of light on germinated seeds.I will investigate the effect of light on germinated seeds. I will explain the role of cotyledons in early plant growth.I will explain the role of cotyledons in early plant growth.

SEEDS OF LIFE

WORD BANK Seed Coat- the protective layer on the outside of the seed Cotyledon- composed of endosperm that provides the plant with food as it starts to grow Dicot- seed with two cotyledons Monocot- seed with one cotyledon

WORD BANK Embryo- Baby plant Germination- process when a seed starts to grow Seedling- Developing plant

WORD BANK Adaptation- Structures and behaviors that increase an organism’s chances of surviving and reproducing.

Seedlings in Dark and Light Do you observe any difference? Look for any green color. Have you seen green in plants before? If you looked at the plant under a microscope, what would you expect to see?

CHLOROPHYLL The green color you see is the chlorophyll that developed in the cotyledons when light fell on the plants. Chlorophyll is an important pigment (a colored chemical) that plays a vital role in the lives of green plants. Chlorophyll captures light energy and makes it available to the plant as a source of energy. We will look more closely at this important action later in the unit.

LAB TECHNIQUE VIDEO

ROOT DIAGRAM

ROOT CAP Very tip of the root is a mass of cells called the root cap. The root cap protects the root tip as the root pushes through the abrasive soil.

ROOT TIP Just behind the root cap is the root tip. The cells here are very small and compact. This is where cells are actively dividing, pushing the root down into the soil

ZONE OF ELONGATION The cells in this area close to the tip are growing longer. They are forming into channels that will allow water to flow through the rest of the plant.

ZONE OF MATURATION and ROOT HAIRS Mature root cells develop hair- like structures called root hairs. This is the zone of maturation. Root hairs are like fingers on a glove. They take up water and minerals from the soil that the plant needs to survive.

WORD BANK Root Cap- Mass of cells that protects the root tip. Root Tip- Actively growing area of the root Zone of Elongation- Area where cells grow longer and form into channels so water can flow to the rest of the plant

WORD BANK Root Hairs- Fine hair-like structures that take up minerals and water from the soil. Zone of Maturation- Area where root hairs grow. Vascular Channels- Carry water to all the parts of the plant.

ROOT DISCUSSION Do all the cells in the root look alike? How are they different? Roots grow longer day by day. How do roots grow?

VASCULAR CHANNELS Do you think channels are only in the roots, or throughout the whole plant? If they are in the whole plant, what function do they have (what do they do)? How could we observe this movement of water in a plant?

CELERY DEMONSTRATION I have a stalk of celery. It is a stem with leaves, but no roots. We are going to stick it in water like a flower in a vase.

CELERY Do you think this plant with no roots will be able to take up water? How will we know if it takes up any water?