1. Plant Classification and Reproduction
Chapter 11B
Plant Reproduction

2. Sexual Reproduction Offspring receives genes from both parents
Not exactly like either parent
Genetic variation

3. Sexual Reproduction
Gametes are special sex cells designed to transfer or receive the chromosomes
One of each type of chromosome
Haploid

4. Sexual Reproduction Fertilization
Zygote
Diploid
In flowering plants these cells are produced in flowers

5. Flowers Four types of appendages attached to a base Sepals Petals
Stamen
Pistil
Positioned in same order

6. Flowers Sepals Leaflike structures
Protect flower while it is developing
Usually green

7. Flowers Petals Often the largest and most colorful part
Help to attract insects and other pollinators

8. Flowers Stamen Male reproductive part Filament and anther
Anther contains pollen
Male gametes

9. Flowers
Pistil
Female reproductive part
Ovary
Style
Stigma

10. The process of transferring pollen from an anther to a stigma
Pollination
The process of transferring pollen from an anther to a stigma

11. Pollination Pollen reaches stigma Pollen tube Ovules
Male gamete enters ovule and merges with the egg
Fertilization

12. Pollination Fertilization produces a zygote Zygote grows into embryo
Entire ovule develops into a seed

13. Pollination & Fertilization

14. Pollination Parts of a seed: Embryo Stored food Protective seed coat
Cotyledon
Monocots and dicots
Protective seed coat

15. Monocots vs Dicots

16. Pollination Changes to flower: Petals and stamens shrivel and fall off
Stem becomes thicker and stronger
Ovary develops into a fruit

17. A mature ovary that contains seeds
Fruit
A mature ovary that contains seeds

18. Fruit Seeds are released Some seeds germinate
Proper conditions are required

19. Asexual Reproduction Also known as vegetative reproduction
Does not involve gametes
Very little genetic variation

20. Asexual Reproduction Examples: Runners with plantlets Root sprouts
Leaf cuttings
Buds (or “eyes”)