Search over 10,000 free study notes

A pathogen is a harmful organism that causes infectious diseases. There are many types of pathogens: bacteria, fungi, viruses, protoctists, worms and insects. They allow diseases to be transmitted from pe...

The ancestors of modern Lemurs arrived in Madagascar and spread across the island. At some point after this, the once contiguous population became fragmented into three separate populations. Each of these...

Aerobic respirations occurs in the presence of oxygen, the products of which are water, carbon dioxide and energy. (glucose + oxygen -> carbon dioxide + water + energy)Anaerobic respiration doesn't use...

Since arteries need to pump blood to the entire body under high pressure, they are very strong with thick muscular walls. Artery walls are also elastic, which allows them to stretch and spring back in ord...

DNA is a long list of instructions which everyone has inside the nucleus of each of their cells. A section of DNA that has instructions to make a certain protein is called a gene. Now bec...