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Cells
Nutrition in Man
Nutrition in Plants
Respiration
Ecology
100
Which part of the cell controls the movement of certain substance in and out of the cell?
cell membrane
100
What is the scientific name of the gullet?
oesophagus
100
where is chlorophyll found in?
chloroplast
100
Which part of cell is responsible for respiration?
mitochondria
100
What is a habitat?
place where an organism lives
200
Name three differences between animal and plant cell.
Vacuole (small and many VS large and central), animal cell has no chloroplasts and cell wall.
200
Describe the chemical digestion that occurs in the stomach.
Protease (pepsin) digests proteins to polypeptides.
200
List the conditions of photosynthesis.
light energy, chlorophyll, suitable temperature
200
Trace the pathway of inhaled air
nasal cavity/mouth to pharynx to larynx to trachea to bronchi to bronchioles to alveoli
200
A herbivore is always located at the second trophic level. True or false?
true
300
Describe how the red blood cell is adapted for its function.
no nucleus (more space to pack in haemoglobin) biconcave shape (increase surface area to volume ratio for efficient gaseous exchange)
300
Explain why emulsification is necessary.
Breaks up fats to smaller droplets to increase surface area to volume ratio for faster digestion by lipase.
300
Which leaf cells are mainly responsible for photosynthesis?
palisade mesophyll cells
300

DJ - State the word equation for respiration

glucose + oxygen --> carbon dioxide + water + large amounts of energy

300
How much energy is passed down from one trophic level to the next?
10 %
400
Explain what is meant by cell differentiation.
Cell has special features that allow it to carry out its function efficiently.
400
Name two ways in which the small intestine is adapted for its function.
it is long, and inner walls are extensively folded.
400

DJ - State the role of guard cells.

regulates size of stomata, controlling gaseous exchange

400
What substance can be used to absorb carbon dioxide?
sodium hydroxide and potassium hydroxide
400
When you eat a carnivorous fish, you are a .. decomposer/primary consumer/ secondary consumer/tertiary consumer?
tertiary consumer
500

DJ - Explain what is meant by an organ.

An organ contains more than one type of tissue, all working together for a specific function.

500
Outline the procedure of a reducing sugar test.
To an equal volume of sample in test tube, add Benedict's solution. Put in boiling water bath for 3 - 5 minutes. Observe for any precipitate for presence of reducing sugar.
500
What is the purpose of putting a plant in the dark before experiment?
to allow plants to use up stored starch. so that any positive results is attributed to experimental conditions.
500

DJ - State one way the lungs is adapted for its function.

numerous alveoli, wall of alveolus one cell thick, thin film of water covers surface of alveolus to allow oxygen to dissolve. walls richly supplied with capillaries

500
Draw a pyramid of numbers for the following food chain. grass plant --> rabbits --> parasitic fleas
base : plant top tier: fleas, bar length longer than rabbits