Which of the following does not happen during inspiration?
intercostal muscles contract
Ribs move forward
Thoracic cavity increases
Diaphragm relaxes
Internal air pressure decreases
Correct answer is D
No explanation has been provided for this answer.
The stomata of a leaf performs the same function as
spiracles of insects
trachea of toads
pharynx of man
liver of man
scales of fish
Correct answer is A
No explanation has been provided for this answer.
The inside of a vacuum flask is usually coated with silver to reduce heat lost by
convection
conduction
radiation
absorption
evaporation
Correct answer is C
No explanation has been provided for this answer.
Which of the following organism respires through the body surface
Man
Fish
Tridax
Amoeba
Hibiscus
Correct answer is D
No explanation has been provided for this answer.
The heating element in an electric kettle is usually located near the bottom of the kettle because
water is a good conductor of heat
heat can be more quickly radiated to all parts of the water
no heat can be lost to the surroundings
the convectional currents which are set up can carry heat to all parts of the water
the molecules of the heating element can carry heat to all parts of the water.
Correct answer is D
No explanation has been provided for this answer.