Answer:
ai) P= Red blood cell Q= Alveoli
ii)1. It gives the lungs a large surface area to volume ratio.
2. It is moist and thin.
b) P has a disc or biconcave shape which allows the O2 to bind to it with the help of a protein called haemoglobin for it to be transferred to various parts of the body.
c) Carbon monoxide will bind to the haemoglobin to form carboxyhaemoglobin causing oxygen disruption
The amount of light. He is testing the effects of light, which implies there will be different amounts of light tested to reach a conclusion.
Well, during a solar eclipse the moon shadow blocks out the sun from earth and during a lunar eclipse the earth shadow blocks our view of the moon.
Complex molecules are made up of other elements bonded with carbon. Carbon is able to bond with other molecules so easily because it has four valence electrons.
