Breathing & Gaseous Exchange

Name the gaseous exchange structure in a root.

• Lenticel

• leaves

• stomata

• Stoma

Name A

• Stomata

• Guard cells

• Stoma

• Guard cell

What is the role of lime water in test tube A?

• To absorb Carbon (IV) oxide

• To show that atmospheric air has low concentration of Carbon (IV) oxide.

• To absorb Carbon (IV) oxide from the living mammal

• None of the above.

What observation is made in Boiling tube B

• Milky substance formed

• It rose in level

• It forms a white precipitate

• No colour change

Which of the following is not true about respiratory structure?

• It is moist

• It is highly vascularized

• It has large surface area

• It is very thick

Which of the following is not a characteristic of a respiratory structure?

• It is moist

• Has large surface area

• It is highly vascularised

• It is rich in mitochondria

Identify the structure shown

• Alveoli

• Alveolus

• Villus

• Villi

Name the gaseous exchange structure in the organism shown.

• Cell wall

• Cytoplasm

• Vacuole

• Cell membrane

Identify the structure.

• Gills

• Gill filament

• Gill filaments

• Gill

Identify part labelled A.

• Gill bar

• Gill rakers

• Gill filament

• Gill bars