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Osmosis is the net movement of water molecules from an area of high water potential to low water potential, commonly across a partially permeable membrane such as a cell's surface membrane.

The sinoatrial (SA) node is a group of specialized cells which sit in the wall of the right atrium. The SA node sets the pace of your heart and is therefore called your pacemaker. SA node sets this pace b...

DNA is made of a string of nucleotide bases attached to one another by a peptide bond. A single nucleotide contains three regions: A phosphate group, a Carboxyl group and a base. Adjacent nucleotides atta...

Planting just one crop such as palm oil in an area decreases biodiversity, resulting in fewer niches for insects. This means that there are fewer insect species in the area, and therefore fewer food sourc...

The diaphragm contacts and moves down. The intercostal muscles between the ribs contract. This causes the ribcage and the sternum to move up and out. The thorax increases in width from back to front. This...