Biology and ecoms ss 2

Respiration in cells produces:

• Water & hydrogen

• Carbon dioxide & water

• Oxygen & sugar

• Salt & oxygen

Excretion in amoeba is through its:

• Lungs

• Skin

• Cell membrane

• Kidney

A key feature of respiratory surfaces is they must be:

• Thick and dry

• Thin and moist

• Rough

• Hard and dry

Lungs are found in:

• Insects

• Fish

• Mammals

• Amoeba

Gills are used for respiration by:

• Earthworms

• Frogs

• Fish

• Birds

Earthworm excretes through:

• Nephridia

• Lungs

• Gills

• Skin alone

Which is not a waste product of respiration?

• Carbon dioxide

• Water

• Oxygen

• Heat

Tracheal tubes are found in:

• Frogs

• Birds

• Insects

• Fish

The kidneys are part of the:

• Digestive system

• Respiratory system

• Excretory system

• Nervous system

Plant excretion occurs mainly through:

• Roots

• Leaves

• Flowers

• Fruits