3. 10-15-12
Chapter 1 -
Lesson 2
Vocabulary
petal
pollen pollinate
1. petal - an outside part of a flower that is often colored.
2. pollen - a fine yellowish powder in a flower.
3. pollinate - to carry pollen to the stemlike part of the
flower.
4. Science Background
· Seeds which contain a plant embryo surrounded by a protective
seed coat, grow inside flowers.
· Flowers are made up of petals and a central pistil (the female
part of the flower) that is surrounded by stamens (male flower
parts). Pollen grains form on stamen tips (anthers).
· During pollination, pollen moves onto the stigma, the sticky tip of
the pistil. Pollination allows the mixing of male and female
gametes, which is necessary for fertilization to occur.
· Plants produced by sexual reproduction inherit genes from both
parent plants, are unique, and may have traits that differ from
those of parent plants. Asexual plant reproduction occurs
through the division of one plant. Plants produced in this way
inherit genes from only one parent and have exactly the same
traits as the parent plant's.
· Plants can reproduce through vegetative propagation using
cuttings, tubers, bulbs, and layering. Tubers, such as potatoes,
have yes that may sprount new shoots. Bulbs, such as tulips
daffodils, onions, and garlic, have lateral, or branch, buds that
develop into new bulbs.
5. Quick Quiz #1
1. What are petals?
Petals are the brightly colored outside parts of a flower.
2. Where are two places you might find pollen in a flower?
Two places you might find pollen in a flower are where pollen is
made (the stamen) and on the tip of the stemlike part (pistil).
3. How does the center part of a flower change as seeds grow?
The center part of a flower changes as it swells to form a fruit
around the seeds.
H.O.T. Remember any part of a plant that has seeds is a fruit.
Therefore, which of the following are fruits and which are
vegetables: an apple, a cabbage, a pepper, a tomato, and celery?
Vegetables = cabbage, celery. Fruits=apple, pepper, and tomato.
6. Science Background
· Pollination is the process of transferring pollen from
one flower part (the male reproductive part) to another
(the female reproductive part).
· Animals and wind are two agents of pollination. The
color and smell of a flower may attract certain animals
with adaptations that allow them to pollinate those
flowers.
· Cones, like flowers, may form seeds following pollination.
Most cone-producing plants are evergreens.
7. Quick Quiz #2
1. What effect do a flower's colors and smells have on animals?
Animals are attracted to flowers by their colors and smells.
2. What happens when a bee lands on a flower?
When a bee lands on a flower, the bee brushes against
pollen and the pollen sticks to the bee's body.
3. What are two ways that a flower can be pollinated?
Two ways that a flower can be pollinated are by wind and/or by
animals scattering the pollen.
H.O.T. Some plants depend on specific insects to pollinate them.
What might happen if the insects that pollinate a particular
type of plant were killed by pesticides? If the insects that
pollinate a particular type of plant were killed by pesticides, the
plants would no longer form seeds and reproduce.
8. Lesson Review page A17
1. How do plants with flowers form seeds?
A: Pollen reaches the center part of the flower. Seeds begin to
grow. A fruit forms around the seeds.
2. What are two ways that pollen can be scattered?
A: Two ways that pollen can be scattered are wind
and animals.
3. How do plants with cones form seeds?
A: Pollen from one cone travels through the air to the other cones
and pollinates them. Seeds begin to grow inside the pollinated cones.
4. Sequencing - Suppose a bee pollinates a flower. Describe, in
order, how a fruit might form (3-steps). A: Pollen moves to the
center part of the flower. Seeds begin to form. Fruit forms
around the seeds.
9. the flower
is where the
seeds are formed.
the stem
carries water to
all plant parts.
the seeds
the leaves will grow into new plants.
make food for the plant.
the fruit
contains the seeds.
The roots
absorb water
and minerals from the soil
