6.L.1.1 Summarize the basic structures and functions of flowering plants required for survival, reproduction and defense.

The male part of aflower is called the stamen.

The stamen is made of the stalk-like filament which holds up the sac-like anther.

The anther contains pollen which contains the sperm.

Flowers that have only male parts are called staminate.

The female part of a flower is called the pistil or carpel.

Made up of a sticky tissue at its end called the stigmareceptive to pollen.

Below the stigma is a rod-shaped middle part called the style and a swollen base containing eggs called the ovary.

Flowers that have only female parts are called pistillate.

Stigma

Style

Ovary

Petal

Calyx

CorollaSepal

The petals of a flower are usually very colorful to attract pollinators.

Once the pollen reaches the stigma, it forms a pollen tube down through the style to the ovary where sperm is deposited.

Plants may produce flowers that are perfect or imperfect.

A flower that has both male and female parts is called a perfect flower.

A flower that is missing either male or female parts is called an imperfect flower.

Plants may have flowers that are complete or incomplete.If a flower has sepals, petals, pistils, and stamens, it is referred to as a complete flower.If a flower is missing one of these parts, it is referred to as an incomplete flower.Imperfect flowers are always incomplete. Incomplete flowers may or may not be imperfect.

A. Absorb all of the water and minerals that a plant needs to live.

B. Anchor the plant to the ground and support the above ground part of the plant.

C. Store food made through photosynthesis.

The first structure to emerge from the germinating seed is a root called a radicle.

This root becomes the primary root, and on some plants it is the most important root in the whole root system.

Other roots eventually branch out from the primary root. These are called secondary or lateral roots.

White in colorFresh smelling

The illustration below shows a flower with several parts identified.

Which labeled parts include all the female reproductive organs? A. parts 1 and 2 B. parts 4 and 5 C. parts 1, 2, and 3 D. parts 1, 3, and 5

Which is the best explanation for why a flower’s petals are colorful? A. They attract more sunlight. B. They attract more pollinators. C. They protect the plant from disease. D. They protect the plant from cold weather.

What is the male part of a flower called? A. Stigma B. Carpel C. Pistil D. Stamen