1. Warm Up #
What is the difference between sexual and asexual reproduction in plants?

2. Lesson 3: Plant Reproduction

3. Essential Questions What is the alternation of generations in plants?
How do seedless plants reproduce?
How do seed plants reproduce?

4. How can you identify fruits? ACTIVITY
Examine the pictures
Determine whether each item is a fruit.

5. How can you identify fruits? ACTIVITY
Look at the insides of the foods from the past slides.
What do you notice? Do you agree with your previous thoughts?

6. Asexual Reproduction vs. Sexual Reproduction
Asexual reproduction – part of plant develops into a separate new plant, which is genetically identical to the parent plant
Sexual reproduction – plant’s sperm combines with a plant’s egg creating a zygote with a genetic combination of its parents
BrainPop- Asexual Reproduction

7. Alternation of Generations – occurs when the life cycle of an organism alternates between diploid and haploid generations

8. Reproduction in Seedless Plants
First land plants were seedless plants like mosses and ferns
Grow in moist environments where sperm must swim through the water to reach an egg
BrainPop –
Seedless Plants

9. How do seed plants reproduce?
Pollen grain – forms from tissue in a male reproductive structure of a seed plant
Produce sperm cells
Wind, animals, gravity, or water carry pollen to the egg
Pollination – occurs when pollen grains land on a female reproductive structure of a plant that’s the same species as the pollen grains
Dormancy – time of no growth
Can last days, weeks, or years
BrainPop- Pollination

10. How do seed plants reproduce?
Ovule – the female reproductive structure of a seed plant where the haploid egg develops
After pollination, fertilization occurs by sperm entering ovule creating a zygote
Embryo – an immature diploid plant that develops from the zygote
Seed contains the embryo, food supply, and a protective covering

11. Reproduction in Flowerless Seed Plants
Gymnosperm = naked seed, not surrounded by a fruit
Ex. Conifers like pines,
firs, redwoods, shrubs with
needlelike leaves

12. Reproduction in Flowering Seed Plants (Angiosperms)
Reproduction begins in the flower
Male reproductive parts:
Stamen- male reproductive organ with pollen grains on the anther
Filament supports the anther
Female reproductive parts:
Pistil – female reproductive organ
where pollen lands on the stigma
Ovary – at the base of the style that
contains ovules
BrainPop – Plant Growth

13. Life cycle of an Angiosperm
BrainPop- Seed Plants