1. 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

2. Announcements Past Due: Today: 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.

3. Plant Reproduction

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

5. Plant Reproduction Flowers are the reproductive organs of plants
Many flowers have both male and female reproductive parts

6. 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
Female Reproductive Structures
Male Reproductive Structures

7. Male Reproductive Structure
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

8. Pollen Grain
Anther Sac

9. 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

10. Fertilization
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

11. Fertilization
Male gametes travel along the pollen tube and into the ovule
The male gamete fuses with the female gamete – fertilization has taken place

12. Seed and Fruit Development
After fertilization, the petals and sepals fall off flower
Ovary “ripens” into a fruit
The ovule develops into a seed

13. Other Reproductive Structures
Petals: colorful
structures that attract pollinators.
Sepals: surround and protect the flower bud.

14. 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?

15. Pollination
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

16. 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

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

18. 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

19. Gravity Dispersal - Heavy nuts fall to ground and roll
ex. acorns
Water Dispersal - Plants
near water create floating
fruits
ex. coconuts

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