450 likes | 817 Views
Lesson 1- Plant Structure. Ms Jan. Plant Structure SLOs. Label the structures on a plant State the function of different structures on plants. Diagram of a simple plant. Plant parts and their function. Leaves: absorb sunlight and transform it into food
E N D
Lesson 1- Plant Structure Ms Jan
Plant Structure SLOs • Label the structures on a plant • State the function of different structures on plants
Plant parts and their function • Leaves: absorb sunlight and transform it into food • Stem: carry nutrients and water from the roots to other parts of the plant • Root: absorb water and nutrients from the soil. Also anchor the plant to the ground and often store food • Flower: sexual reproduction through the production of seeds
Classification of plants SLOs • Classify plants into angiosperms (monocotyledon, dicotyledon) gymnosperms, ferns, mosses and algae by observing physical features • Identify the factors necessary for seeds to germinate • State what germination means
Algae Algae are water dwelling plants – very small (usually) and floating. They make fresh water slimy (green in your fish tank) and in sea water are sea weeds.
Mosses and liverworts Simple plants with simple roots and leaves – need damp environment
Liverwort • Cross between an algae and moss • Tend to form on tree trucks and stones • Can survive with little water
Ferns Ferns have fronds instead of leaves and do not produce seeds – only spores
Who am I?? • “I can long and thin, I carry food and water around the rest of the plant. In addition, leaves stick to me” • “I live in damp places. I am very small, and live close to others. I feel soft and spongy underfoot” • “I am very important to a plant, but don’t usually see the light. I have a branched appearance. I am important for keeping the rest of me solidly in the ground. Most importantly I absorb water and nutrients for the rest of me”
Conifers Conifers are cone – bearing plants also called ‘gymnosperms’
Conifers (gymnosperms) Conifers produce male and female cones and then the seeds mature in the female cones
pine miro
Tane mahuta New Zealand’s biggest and oldest Kauri tree is a conifer
Angiosperms produce flowers and seeds. Flowers are the sex organs of plants. Angiosperms = flowering plants
female male
Angiosperm monocotyledons Dicotyledons (Monocot) (Dicot) A ‘cotyledon’ is a seed leaf –that is a food storage area in the seed. The developing embryo uses this food to grow until the plant can use photosynthesis for food.
monocots Monocots have: • One seed leaf • Parallel veins in leaves (which are usually long and narrow) • Fibrous roots • Flower parts in threes
Harakeke (flax) and Ti kouka (cabbage trees) are native monocots
dicots Dicots have: • 2 seed leaves • Branched veins in leaves (which are usually broad) • Tap roots with branches • Flower parts in fours or fives
NZ trees – do you recognise these? 5 finger Bracken Kauri Puriri Remu Lancewood
Plant Types answers Name of plant Group Rose Dicotyledon Kauri Gymnosperm Toi toi Monocotyledon Pohutukawa Dicotyledon Bracken Fern Bull Kelp Algae Beech Dicotyledon Radiata pine Gymnosperm