Over a million students use our free study notes to help them with their homework
Cells are the basic building blocks of all living organisms. A tissue is a group of cells with a similar structure and function. Organs are aggregations of tissues performing specific functions. Organs ar...
Reduced NAD and FAD from the Krebs cycle are re-oxidised in the electron transport chain, situated on the inner mitochondrial membrane. The electrons are passed down the protein complexes embedded in the ...
An enzyme is a protein that speeds up a chemical reaction. For example, the food you had for your lunch today was probably made up of complex carbohydrates, proteins and lipids. These need to be broken do...
Panama has acted as a geographical barrier, separating two populations of ancestral shrimp - one in the Pacific and one in the Caribbean Sea.Random mutations will occur in both populations.Natural selecti...
Human circulation is a closed system that may be divided into systemic and pulmonary circulation. The first one is a loop from the heart to the body. The second one is a loop from the heart to the lungs. ...
←
81
82
83
84
85
→
Internet Safety
Payment Security
Cyber
Essentials
