Silently, answer the following question in your notebook:

Explain the difference between each of the following pairs of words
1.
cell membrane, cell wall
2.
osmosis, diffusion
3.
enzyme, substrate
4.
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.

http://www.youtube.com/watch?v=CkBNEM2mD30

1.
Get your assigned ipad
2.
Go to my Weebly(ctompkinsasuprep.weebly.com)

Coordinated Science II
3.
Click on “Classwork: Plant Reproduction”
4.
Open the Powerpoint and use it to answer the questions on the handout


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


The stamen consists of two parts: Anther and
Filament

The anther is where meiosis occurs to produce haploid pollen

The filament is a stalk that supports the anther

• Pollen
Grain
• Anther
Sac


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


After fertilization, the petals and sepals fall off flower

Ovary “ ripens ” into a fruit

The ovule develops into a seed


Petals : colorful structures that attract pollinators.

Sepals : surround and protect the flower bud.

Reflect
[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

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

Reflect
[Write your answer on the worksheet.]
After pollination, how does the male gamete reach the ovule?

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

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