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Photosynthesis requires optimal temperatures, high levels of light, and carbon dioxide. The limiting factor of photosynthesis is the factor with the least favourable level; ie. increasing this will increase ...

Note: Keywords which are vital for marks will be highlighted in bold. Within all populations, there is variation. This is due to different alleles (types) of different genes being present in different indivi...

Firstly, you need to understand that there are two main types: Passive Immunity and Active Immunity. We will take them one by one and break them down now. 1. Passive Immunity: As its name suggests, passive i...

Oxygen is a critical component of Aerobic respiration in many animals. The reason why oxygen is so important is because it plays a crucial role in the mitochondria, the powerhouses of the cell. The mitochond...

Breathing consists of two phases called inhalation and exhalation. Inhalation In order for air to be drawn into the lungs during inhalation the volume of the thorax must increase . This is brought about due ...