Plant Reproduction Lesson Outline LESSON 3 A.

Name
Date
Class
Lesson Outline
LESSON 3
Plant Reproduction
A. Asexual Reproduction Versus Sexual Reproduction
1. Plants can
2.
asexually or sexually.
reproduction occurs when a portion of a plant develops
into a separate new plant that is genetically identical to the parent.
3. One advantage of asexual reproduction is that just one parent organism can
produce
4.
.
reproduction in plants usually requires two parent
organisms.
5. Sexual reproduction occurs when a plant’s sperm combines with a
plant’s
.
6. A new plant produced by
reproduction is a genetic
combination of its parents.
B. Alternation of Generations
1. Plants have two life stages called
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2.
.
of
is when the life cycle of
an organism alternates between diploid and haploid generations.
3. Daughter cells produced from haploid structures are
4. Spores grow by
.
and cell division and form the haploid
generation of a plant.
5. In most plants, the
generation is tiny and lives
surrounded by special tissues of the diploid plant.
6. Fertilization takes place when a haploid sperm and a haploid egg fuse and form a
diploid
. Through mitosis and cell division, the zygote
grows into the
generation of a plant.
C. Reproduction in Seedless Plants
1. The first land plants to inhabit Earth probably were
plants—plants that grow from haploid spores, not from seeds.
2. Moss plants grow by
and cell division from haploid
spores produced by the diploid generation.
3. The
generations of ferns are the green leafy plants
often seen in forests.
Plant Processes and Reproduction
47
Name
Date
Class
Lesson Outline continued
D. How do seed plants reproduce?
1. Unlike seedless plants, the
generation of a seed plant is
located within diploid tissue.
2. A(n)
forms from tissue in a male reproductive structure
of a seed plant.
a. Pollen grains produce
b.
cells.
occurs when pollen grains land on a female
reproductive structure of a plant that is the same species as the pollen grains.
3. The female reproductive structure of a seed plant where the haploid egg develops is
called the
.
a. After fertilization occurs, a zygote forms and develops into a(n)
, which is an immature diploid plant that develops
from the zygote.
b. An embryo, its food supply, and a protective covering make up
a(n)
.
4. Flowerless seed plants are also known as
.
a. The most common gymnosperms are
, which are trees
b. The male and female reproductive structures of conifers are
called
.
5. Fruits and vegetables come from
, or flowering plants.
a. The male reproductive organ of a flower is the
.
b. The female reproductive organ of a flower is the
c. The
.
of a flower contains one or more ovules.
d. Angiosperm pollen grains travel by wind, gravity, water, or animal from the
anther to the
, where pollination occurs.
e. The ovary and sometimes other parts of a flower will develop into a(n)
that contains one or more seeds.
f. Fruits and seeds are important sources of
for people
and animals.
g. When an animal eats a fruit, the fruit’s
can pass
through the animal’s digestive system with little or no damage.
48
Plant Processes and Reproduction
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and shrubs that have needlelike or scalelike leaves.