Question

1.Use of lime water in most experiments on respiration 2. Respiration rate is higher in animals than in plants

Answer 1

RESPIRATION RATE IS FASTER IN ANIMALS THAN PLANTS.
Respiration is the process in which glucose is oxidised to provide energy.So,higher the energy demands,faser will be the rate of respiration.
As animals usually breathe in the air for carrying out cellular respiration.Plants lack a respiratory system,which is usually found in animals.In plants ,the leaf obtains oxygen directly from the air through the stomata.

USE OF LIME IN MOST EXPERIMENTS ON RESPIRATION
It is essential to eliminate volume changes that are caused by anything other than the uptake of oxygen by the respiring seeds.As the seeds respire,they will produce carbon dioxide which is absorbed by soda lime.the volume of air in the flask decreases as oxygen is used up.
.