Search over 10,000 free study notes

Glucose is the main molecule used for respiration and is given the name of 'main respiratory substrate'. It is the main respiratory substrate in both aerobic and anaerobic respiration processes. Aerobic resp...

To start we need to ask: what causes an infection? The answer is a pathogen, which is a microbe that causes disease. These can be bacteria or viruses. A vaccine contains dead or inactive pathogens that are i...

Evolution by natural selection occurs through mutations within organisms of the same species that makes every organism slightly different. Those organisms with the favourable mutation for the environment wer...

Mineral ions are transported into root cells by INDIRECT ACTIVE TRANSPORT/UPTAKE. First of all, hydrogen ions are pumped out of the root cells' vacuoles into the soil. This creates a concentration gradient b...

Diffusion is the spreading out of the particles of any substance in solution, or particles of a gas, resulting in a net movement from an area of higher concentration to an area of lower concentration . This ...