Top answers

what are principles of organisation in the human body?

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 are o...
RM
Answered by Rasha M. • Biology tutor
2861 Views

Outline the processes involved in the generation of ATP through chemiosmosis (6 marks)

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 ele...
NN
Answered by Nudrat N. • Biology tutor
13530 Views

What is an enzyme and how do they work?

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 down ...
KH
Answered by Katherine H. • Biology tutor
3297 Views

Panama is a strip of land that has separated the Pacific Ocean and the Caribbean Sea for the past 3 million years. Explain how two different species of pistol shrimp could have developed from an ancestral species of shrimp

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 selection ...
DR
Answered by Daniel R. • Biology tutor
8555 Views

How does the oxygenated and deoxygenated blood travel throughout the heart?

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. In ...
JŻ
Answered by Julia Ż. • Biology tutor
2562 Views