Exploring Plant World - Many Parts Many Jobs

 

All living things depend on plants. Without plans, the only thing you could eat would be water! Each parts of the plant has a specific job. One part holds the plant up while another makes food. Let's look at the parts of the plant:

Seeds

The inside of a Ginkgo seed, showing a well-developed embryo, nutritive tissue, and a bit of the surrounding seed coat

Each seed has a seed coat, or covering. This protects the young plant inside the seed from drying out of from being easily crushed. Most seeds come from flowers, but some come from cones. Pine trees have cones but not flowers.

Flowers

The flower's job is to make seed. The petals of some plants are brightly colored to attract bees and other insects to the flower.

 

As the bee take nectar from the flower to make honey, it also picks up a yellow dust called pollen on its legs. The bee visit another flower ans some of the pollen dust from the last flower drops off in to the flower. We call this pollination.

Pollination is the act of moving pollen from one part of a flower to another, or from one flower to another, so that the flower can make seeds.

Stems

The stem contain tiny tubes though which water and food travel from the roots to the leaves and flowers as they need them. Some plant have tall stems, some have short stems, ad the other have soft stem. Some stem are rough, such as the woody stems of trees, vines, and shrubs.

 

Leaves

The leaves are attached the the stem. A leaf's job is to make food for the plant. Chlorophyll is the green material in plants.

On sunny day, the green plant take water from the plant + take carbon dioxide from the air + chlorophyll, the leaf will make a simple sugar called glucose. Using glucose ans minerals, the plant will make other sugar, starches, fats, ans cellulose. This process called photosynthesis.

Roots

Roots holds the plant in the ground. They also take minerals and water from the soil and send them through the stem to all parts of the plant.

Science G3. First Semester

Fourth week on August 2015