Write the name of the process of stomatal opening and closure.
Circadian rhythm
Transpiration
Oxidation
Respiration
The respiratory organ of fish is called:
Lungs
Skins
Gills
Tracheae
Which one of the following is the by-product gas of photosynthesising ?
Nitrogen gas
Ammonia
Oxygen
Carbon dioxide
The water proof layer that protects human skin.
Epidermis
Keratin
Waxy layer
Chitin
Guard cells become turgid by actively transporting which of the following ions?
Nitrogen
Potassium
The most numerous cells in the epithelium of the bronchus and bronchioles are called:
Ciliated cells
Smooth muscle
Mucus
Epithelium
Name the process by which the exchange of gases between an organism and its environment takes place.
Diffusion
Dispersion
Oxygenation
All of these
The respiratory system of insects is called:
Large amount of water vapour are lost from leaves by which of the following process?
Photosynthesis
Osmosis
The branchioles end in millions of tiny interconnected cavities called:
Trachea
Bronchi
Alveoli
Sternum