Breeding of high-yield crops
Selective breeding of dairy cows for more milk production
Breeding of dogs for specific traits
Related Questions:
- Write the differences between:
 - Name sources of variation.
 - Name the structure through which the exchange of gases can take place in plants.
 - Name the ways through which a plant can obtain oxygen.
 - Why should one not sleep under a tree at night?
 - Why would very wet soil be dangerous to plants
 - Why do plants not need a specialized respiratory system?
 - How does the exchange of gases take place in alveoli?
 - What is the effect of exercise on the rate of breathing?
 - Compare inspired air and expired air.
 - How do viral infections like COVID-19 affect bronchi?
 - What is the importance of breathing in fresh air?
 - What is the importance of keeping the nasal and oral cavity clear?
 - Differentiate between:
 - Breathing through the nose is healthier than breathing by mouth. Why?
 - What are the conditions necessary for efficient gaseous exchange between an organism and the environment?
 - Describe the effects of cigarette smoking on the inner walls of the trachea of human beings.
 - The diagram shows the percentage of gases in inspired and expired air.
 - The figure shows a healthy lung and a diseased lung.
 - The diagram shows the structural and functional unit of the lungs.