A nerve that is involved in many functions in the facial area including facial expression, salivary glands and taste buds.

Facilitated transport is executed by a carrier molecule though requires no energy.

Faeces are the waste material removed by animals via the anus, which is passed along the large intestine in the body. Water is removed from faeces via re-absorption before they are excreted.

A tube that transports egg mother cells to the uterus, the destination at which they may be fertilised and fused with a sperm mother cell.

A type of taxon used in systematics. Families are more exact than orders, but less exact than genera (plural of genus). Organisms that share the same family would have evolved from the same ancestors and share relatively common characteristics.

A condition brought about by fungal spores present in hay which is inhaled into the lungs, which results in lesions of the tissue. The condition is not limited to farmers, but as it occurs most commonly in those who work in a farm environment, hence the t.

Sheets of connective tissue.

Found in most organisms, fat contains twice as much energy as a carbohydrate, and is stored by the body due to this. There are many different types of fats, otherwise known as triglycerides, which have variou.

An illustration of an embryo indicating areas where future development of the structure will occur.

Tired, exhausted.

Differentiated into saturated and unsaturated, fatty acids are the components of fats

The grouping of animals to any one location, time in history or any other relevant classification.

A region characterised by particular species of animal.

The number of offspring produced by an organism in its lifetime.

A mechanism that is controlled by receptors that either initiate or inhibit the reaction. Negative feedback is a mechanism capable of maintaining homeostasis in an or.

A leg joint between the trochanter and tibia.

The thigh bone.

Organisms that are existing in their wild capacity.

An occurrence in reproduction where the male and female gametes fuse to form a zygote which will eventually grow into a mature adult form of the parent organisms.

A membrane that is found on the surface of an egg after fertilisation to prevent further

Fertiliser

Chemical compounds used by humans in agriculture to rid their crops of pests that reduce the yield of the crops.

A situation in the heart in which a large contraction of the ventricular muscle of the heart stopping blood from flowing normally. This situation can be remedied by passing an electrical current through the body usi.

A bone found in the legs of tetrapods that lie adjacent to the tibia.

An occurrence in response to stimuli that may harm an organism. It is characterised by increased blood pressure and heart rate as a response to higher concentrations of adrenaline in the body. Overall the react.

Muscles that are responsible for the bending of a limb.

Locomotion over an air medium, either by active flight or passive flight (gliding).

A hormone in plants that is though to react in the presence of light, and therefore play a part in photoperiodism.

The hypothetical model that the plasma membrane is believed to be structured like. The fluid mosaic model essentially consists of a bilayer of phospholipid molecules and various protein molecules that also play a role within the membrane.

See the cell biology tutorial for more basic information about the structure of a biological cell.

A process common in water treatment by humans which involves adding fluoride to the water system. Around one part per million is added and is done so to prevent tooth decay.

A compound of fluorine that is thought to reduce tooth decay by replacing hydroxyl groups in bones and teeth.

A developed embryo that appears to have similar structural characteristics to that of its adult form.

Otherwise known as vitamin C, which plays a part in the production of nucleic acids and red blood cells, therefore is an essential constituent of a balanced diet.

A small sac -like cavity.

A glycoprotein secreted by the pituitary gland responsible for stimulating growth in the reproductive areas to produce healthy sperm and eggs.

Any material that is capable of being absorbed by an organism and will provide the materials for energy production and structural growth when the components of the foodstuff is harnessed.

An interconnected chain of organisms indicating which species are predators and which are prey in relation to one another. All energy in a food chain will begin with the autotrophs, which will be fed upon by herbivores.

An ecosystem heavily colonised by trees.

The degraded remains of a dead organism that is buried under the sediments on the land surface that accumulate over a long period of time, which helps to preserve the fossil in this timeframe.

The physical proof of fossils found deep underground that helps us to understand the sequence of events over time in respect to which organisms were alive, where they lived, what they looked like and so forth.

The amount of energy available for reactions to occur.

Water that possesses little dissolved minerals such as salt and is defined as "fresh" water as opposed to salt water found in the oceans. Freshwater environments are created by precipitation and its run off from high altitudes towards the coasts (a river) or a trough in the landscape in which freshwater collects (a lake). Check out the freshwater ecology tutorial for more information.

See Drosophila.

A carotenoid pigment present in chlorophyll c, which is capable of absorbing more light in depths of water than chlorophyll a would, and therefore prevails in aquatic autotrophs.

A thick layer of fine hair that grows on mammals to reduce heat loss and provide a degree of protection.