1. Tick (√) the correct answer from the options given below:
[1x5=5]
a) ___________________________ cells carry messages around the body.
1) Muscle
2) Nerve
3) Blood
4) Fat
b) ___________________________ system is made up of the heart and blood vessels.
1) Muscular
2) Skeletal
3) Respiratory
4) Circulatory
C) Animal cells do not have _____________________________.
1) chloroplasts
2) cytoplasm
3) nucleus
4) membrane
3) Bone
4) Skin
d) ___________________________ cells kill germs.
1) Red blood
2) White blood
e) As cells use food and energy, they produce ________________________waste.
1) hydrogen
2) nitrogen
3) carbon-di-oxide
2. Fill in the following blanks by choosing the words from the given box:
4) oxygen
[0.5 x 6=3]
Diffusion, organ, semi-permeable, tissue, digestive, daughter
a) A ___________________________is a group of cells.
b) A parent cell divides into two or more ____________________________ cells.
c) An ________________________________ system is a group of organs that work together to perform one or
more functions.
d) ________________________ is the movement of molecules from a region of higher concentration to a
region of lower concentration.
e) _________________________________ membrane let water molecules pass through but stop larger
molecules.
f) The ____________________________ system is made up of gullet, stomach and intestines.
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3. Identify the following diagrams:
a)
[1x5=5]
b)
_____________________________
d)
c)
_______________________________
_____________________________
e)
________________________________
_______________________________
4. Name the following parts of a cell:
[1x5=5]
a) This is a thin skin around the cell. _________________________
b) This is a jelly containing hundreds of chemicals. _________________________
c) It controls what a cell does. _________________________
d) This is a space within the cell containing air, liquids or food particles. _________________________
e) These are tiny discs full of a green substance called chlorophyll. ______________________________
5. Think and answer:
[2]
a) Why does ink move through water even without being stirred?
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-------------End of questions--------------
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