13
2
Copy and correct the false sentences in your notebook.
a)
Plant cells are usually circular.
c)
Leaves, roots and the stem are the organs of a plant.
b)
Plant cells have a rigid cell wall.
d)
The function of the leaves is to absorb water and minerals.
3
9
Listen. Which answer is NOT correct?
a)
They turn their stems.
c)
Their roots grow towards water.
b)
They move from place to place.
d)
They open and close their leaves.
4
T
h
i
n
k
!
Make a Venn diagram to answer these questions.
a)
How are plant cells different from animal cells?
b)
How are they similar?
5
Observe onion cells
.
Draw pictures and label them to show
what you have observed.
a)
Cut open an onion and remove some of the thin membrane
from between the layers.
b)
Put the membrane on a slide and add a drop of iodine solution.
Put another slide carefully on top.
c)
Use a microscope to look at the onion. Experiment with different
lenses.
6
10
QUIZ
Check your learning.
A
C T I V I T I E S
Roots
The function of the roots is to absorb water
and nutrients from the soil. To do this, root cells
have
root hairs
. These hairs increase the area
of the root that is in contact with the soil.
As a result, the roots can absorb more water
and minerals.
Stems
The function of the stem is to support the plant
and transport water, minerals and sap throughout
the plant. Stem tissue forms rigid tubes that
liquids can pass through easily.
Roots
Stem
