Download Binary fission is the simplest method of reproduction. In binary

Binary fission is the simplest method of reproduction. In binary fission, a
parent cell splits in half and produces two new cells. During another type of
asexual reproduction, an organism grows a bulge, which eventually breaks off
the parent cell. This method is called budding.
Have you ever seen a potato with small, green
buds growing on the outside of it? Potatoes have
small spots called eyes which can bud and grow
into an entirely new plant. The potato itself is an
underground stem or tuber that store food.
Cutting up and planting pieces of the potato with
eyes can produce new potato plants. Other vegetables, like onion and garlic,
can grow new green shoots from bulbs at the top of the stem. Some plants,
like strawberries and grasses, grow runners that can sprout shoots and roots
to produce new plants.
Growing a new plant from a piece of a plant is
called vegetative propagation, and is similar to yeast
reproducing by budding. Both are types of asexual
reproduction that require only one parent, and
produce offspring that are exactly like the parent.
Another type of asexual reproduction is called regeneration. Regeneration
allows an organism to grow back parts that may become missing or worn away.
If an organism can generate a whole new organism from one part is shows a
type of asexual reproduction.
Diagram
Name of
Organism
Type of
Asexual
Reproduction
Number of
Parents
Name of
Organism
Type of
Asexual
Reproduction
Number of
Parents
1
2
3
4
5
6
7
8
Answers:
Diagram
1
Potato
2
3
Starfish
4
Onion
5
6
7
8
Paramecium
Vegetative
Propagation
Regeneration
1
1
Planarian
Vegetative
Propagation
Vegetative
Propagation
Regeneration
Yeast
Budding
1
Ivy Plant
Vegetative
Propagation
Binary Fission
1
Spider Plant
1
1
1
1
Study each of the diagrams. Use clues from the diagrams and
information from the reading passage to complete the information in
your chart.
Diagram 1
A white potato that is covered
with “eyes” or buds is buried in
the soil. The eyes grow into
new potato plants
Diagram 2
A whole new starfish can grow
from a single arm that was cut
off of a starfish organism.
Diagram 3
A spider plant sends out
stems that have buds that
grow into new spiders
plants.
Diagram 4
An onion grows from a
short, thick underground
stem called a bulb
Diagram 5
A planarian is a tiny flatworm
that lives in ponds. If a
planarian is cut into pieces,
each piece will grow into a new
planarian.
Diagram 6
Yeast are one celled
organisms that produce
offspring from a bulge that
forms and breaks away from
the parent.
Diagram 7
An ivy plant will reproduce a
whole new plant if a piece of
stem and leaf is placed into
water or soil.
Diagram 8
A paramecium is a one-celled
organism that reproduces by
splitting in half to become two
new cells.
Another type of reproduction is called sexual reproduction. In sexual reproduction, there
are two parents with two sets of genetic material. The offspring inherit a combination of
traits taken from both parents.
We enjoy flowers because they are beautiful and fragrant. The function of a flower
however, is to produce seeds for new plants. Seeds develop in flowers as a result of
pollination, which requires two parent plants. Reproduction that requires two parents is
called sexual reproduction.
In sexual reproduction, both a male and a female parent are involved. Each parent has
special organs that are needed for sexual reproduction to occur. In this lab activity, you
will examine the reproductive parts of a type of plant called an angiosperm. The
reproductive organs of an angiosperm are found in the part called a flower. A flower has
four main parts: the sepals, the petals, the stamens, and the pistil.
1. The sepals are green leaf like
parts that cover and protect
the flower bud.
2. The petals are the colored
parts of the flower that also
help protect the inner parts of
the flower bud. Petals also
attract insects.
3. The stamen is the flower’s male
part. Each stamen is made of a
thin stalk with a knob at the
top. The knobs produce pollen
a yellowish powder that
contains sperm.
4. The pistil is located at the center of the flower is the flower’s female part. At the
top of the pistil is a sticky substance that helps trap the pollen. At the lower end of
the pistil is a bulge call the ovary that contains eggs or ovules.
The transfer of pollen from the stamen to the pistil is called pollination. Insects and wind
help pollination to occur. Fertilization occurs when the pollen joins with the egg cell.
After fertilization, the flower can form seeds, which can grow into new offspring.
Flower Part
Number
Found
Average
Length (cm)
Function
Facilitating Questions/ Ticket Out
1. How many parents are involved in the production of offspring during asexual
reproduction?
2. Where do the offspring from asexual reproduction receive all of their genetic
material?
3. Why do the offspring from sexual reproduction show a greater variety in traits than
the offspring from asexual reproduction?
This was created from Gateways to Science- Grade 7 (green book)