Plant Reproduction


First Five

Silently, answer the following question in your notebook:

Explain the difference between each of the following pairs of words


cell membrane, cell wall


osmosis, diffusion


enzyme, substrate


respiration, photosynthesis


Past Due:

Plant Nutrition Packet

Respiratory System Packet

Circulatory System Problems

 Today:

Fill out Guided Notes

Plant Reproduction HW is on the final page

 Due next class period.

Plant Reproduction

Plant Reproduction


Get your assigned ipad


Go to my Weebly(

Coordinated Science II


Click on “Classwork: Plant Reproduction”


Open the Powerpoint and use it to answer the questions on the handout

Plant Reproduction

Flowers are the reproductive organs of plants

Many flowers have both male and female reproductive parts

Structure of a Flower

1. Pistil/Carpel

2. Stigma

3. Style

4. Ovary

5. Stamen

6. Filament

7. Anther

8 . Petal

9. Sepal

10. Receptacle

11. Stem

Male Reproductive Structure

The stamen consists of two parts: Anther and


The anther is where meiosis occurs to produce haploid pollen

The filament is a stalk that supports the anther

• Pollen


• Anther


Female Reproductive Structure

The pistil (or carpel) consists of the stigma, style and ovary

Meiosis occurs in the ovary to produce haploid ovules

The sticky stigma receives the pollen

(male gamete structure) from the anther

The pollen grows a tube down through the style


After pollen lands on the stigma, a pollen tube grows down through the style to ovary

The pollen tube passes through the micropyle (opening) into the ovule


Male gametes travel along the pollen tube and into the ovule

The male gamete fuses with the female gamete – fertilization has taken place

Seed and Fruit Development

After fertilization, the petals and sepals fall off flower

Ovary “ ripens ” into a fruit

The ovule develops into a seed

Other Reproductive Structures

Petals : colorful structures that attract pollinators.

Sepals : surround and protect the flower bud.


[Write your answer on the worksheet.]

In which part of a flower are male gametes made?

In which part of a flower are female gametes made?


Wind, insects or other animals transfer pollen from the anther (male structures) of one flower to the stigma (female structures) of another

Flowers vary depending on pollination mechanism

Pollination Vectors

Wind Pollination : Dull, scentless flowers with reduced petals

Bees/Butterfly Pollination : Bright color, nectars, scent.

They sip nectar, get pollen on coats, transfer pollen from flower to flower

Bird Pollination : Nectars bright colors, tube-like flowers

Moth Pollination : White petals, open at night

Fly Pollination :Rank odor, flesh colored petals


[Write your answer on the worksheet.]

After pollination, how does the male gamete reach the ovule?

Seed Dispersal Mechanisms-

Allow plants to colonize new areas and avoid shade of parent plant

Wind Dispersal - Flight mechanisms, like parachutes, wings, etc.

Ex. Dandelion, maples, birch

Animal Dispersal - Fleshy fruits which animals eat, drop undigested seeds in feces or burrs which stick to animals ’ coats

Gravity Dispersal -

Heavy nuts fall to ground and roll ex. acorns

Water Dispersal - Plants near water create floating fruits ex. coconuts

Cambridge Practice


Complete the Cambridge Practice Questions at the end of the handout.