Download Unit A Plant Structure and Function Chapter 1 Lesson 1 How Are

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

History of herbalism wikipedia , lookup

Plant nutrition wikipedia , lookup

History of botany wikipedia , lookup

Plant defense against herbivory wikipedia , lookup

Plant use of endophytic fungi in defense wikipedia , lookup

Botany wikipedia , lookup

Plant breeding wikipedia , lookup

Plant secondary metabolism wikipedia , lookup

Ecology of Banksia wikipedia , lookup

Gartons Agricultural Plant Breeders wikipedia , lookup

Plant physiology wikipedia , lookup

Flower wikipedia , lookup

Evolutionary history of plants wikipedia , lookup

Plant morphology wikipedia , lookup

Historia Plantarum (Theophrastus) wikipedia , lookup

Plant ecology wikipedia , lookup

Plant evolutionary developmental biology wikipedia , lookup

Ornamental bulbous plant wikipedia , lookup

Seed wikipedia , lookup

Pinophyta wikipedia , lookup

Perovskia atriplicifolia wikipedia , lookup

Verbascum thapsus wikipedia , lookup

Plant reproduction wikipedia , lookup

Glossary of plant morphology wikipedia , lookup

Flowering plant wikipedia , lookup

Transcript
Unit A
Plant Structure and Function
Chapter 1 Lesson 1 How Are Plants Grouped?
Grouping Plants
Plants are classified according to the way they reproduce. The
main difference between the two large groups of plants is that
some make seeds, and some don't.
Plants That Make Seeds
Conifers are trees or shrubs with needle like leaves. Conifers
produce seeds inside cones, but do not have flowers.
• Plants like pine trees, (which are conifers) make seeds without
having flowers.
Plants That Do Not Make Seeds
• Ferns form tiny cells on the underside of their leaves that can
grow into new plants. These cells are called spores.
• Ferns are large plants that have roots, stems, and leaves, but do
not have flowers or produce seeds.
Lesson 2
What Are the Parts of a Flower?
Flowers with Four Parts
• Many flowers have four main parts:
1. Sepal - cover and protect the developing flower bud (usually
green)
2. Pistil - female part of the flower that has a sticky top and a thick
bottom. The pistil makes eggs that grow into seeds.
3. Stamen - male part of the flower. Pollen is made in the
stamen.
4. Pollen - tiny grains that make seeds when combined with a
flower's egg.
• The petals on a flower attract insects and birds.
• Roots anchor plants in the soil.
Lesson 3 How Do Flowers Make Seeds and Fruits?
When sperm cells from the pollen contact the egg in the ovule,
fertilization takes place. Fertilization is the process by which an egg
and sperm combine to form a seed.
Seeds and Fruits
Within every seed is a tiny embryo that has the potential to grow
into a new plant. Seeds are protected by a seed coat and contain
stored food for the developing embryo.
Monocot seeds have one seed leaf, while dicot seeds have two seed
leaves. In a monocot seed, the stored food is found in the single,
seed leaf.
If a plant is classified as a dicot, then you know that it is a flowering
plant.
• Seeds are formed inside an ovule.
Fruits form on a flowering plant after the flowers are pollinated.
They grow bigger after the seeds form.
Lesson 4 What is the Life Cycle of a Flowering Plant?
Plants Grow From Seeds
Dormancy is a resting stage during which seeds do not grow. Some
seeds can remain dormant for months, even years.
Dormant seeds will germinate when they have water, oxygen and
the right temperature to stimulate germination. Some seeds and
plants need soil to grow.
• Different types of seeds need different conditions to germinate.
Mature Stage of a Plant Life Cycle
A flowering plant is in the mature stage of its life cycle when it
produces seeds.