Question

petal-
adventitious
bud
um leaf
pistil
le
stamen
(male reproductive
male sex cells of the flowering plant (Fig.
part of flower)
8.27).
pistil (female
pollen grains stigma
reproductive part
of flower)
sepal
Here, anther
has been
thalamus
style
cut open
pedicel
to show
pollen grains
Fig. 8.26 Parts of a flower
inside it.
The bright-coloured petals serve to attract
anther
ovary
insects which help in pollination (You will filament
read about pollination later in the chapter).
3. Stamens: They are found just inside the
Fig. 8.27 Structure of Fig. 8.28 Structure
a stamen
of a pistil
petals of the flower. They are usually 4-6 in
number. The stamen is the male
4. Pistil: In the centre of a flower, there is a
reproductive part of a flower. Each stamen
flask-shaped organ called pistil. The pistil is
consists of a thin stalk called filament and a
the female reproductive part of a flower.
two-lobed head called the anther. Each
Each pistil consists of stigma, style and
anther lobe has two pollen-sacs that are filled
ovary (Fig. 8.28).
with pollen grains. Pollen grains are yellow,
Stigma receives the pollen grains from the
fine dust-like particles which contain the
anthers. These pollen grains are carried to the
ovary through style.
ACTIVITY 8
Use Cordova Smart Class Software on the smart board in class to perform this activity.
Visit a nearby park. Collect any five flowers. Observe them closely and record your observations.
S.No. Name of the Pedicel
Number and colour of
Sepals and petals Stamen and
flower
present or
are joined pistil are joined
absent Sepals Petals Stamen Pistil
or separate or separate
1.
la
Port
and are
Bougainvili
examples )
bear flow
plants. Sa
ferns, mos
ther part
2.
=horls o
3.
ve a
a ped
4.
5.
als, pet
arts in
ledsen
A flower which consists of all four whorls is
stamens are joined to form staminal tube and the
called a complete flower. For example, mustard
style passes through this tube.
and Hibiscus. Some flowers do not have all four
The flowers which have both stamens and
whorls and are called incomplete flowers. For
pistil are called bisexual flowers. For example,
example, mulberry and date palm.
mustard and china rose. The flowers which
In some flowers, like tuberose, sepals and petals have either pistil or stamens are called
together form tepals. In some plants, stamens
unisexual flowers. For example, cucumber and
are joined to pistil. For example, in Hibiscus,
bottle gourd.
budst
t-color
pigma
Cordova Learning Series Science-6
Scienc
97​

Answer 1

Cranial and spinal nerves.