The lower regions of the body. In humans it contains the digestive system, kidneys etc.
A measurement is considered to be accurate if it is judged to be close to the true value
Rain that is acidic due to dissolved gases such as sulphur dioxide, produced by the burning of fossil fuels.
The site on an enzyme where the reactants bind
The movement of substances against a concentration gradient and/or across a cell membrane, using energy.
Special feature that makes an organism particularly well-suited to the environment where it lives.
Anti-diuretic hormone secreted by the pituitary gland in the brain that affects the amount of water lost through the kidneys in urine
Process in which the nucleus of an adult cell of one animal is fused with an empty egg from another animal. The embryo which results i spaced inside the uterus of a third animal to develop.
Stem cells (cell with the potential to differentiate and form a variety of other cell types) that are found in small quantities in adult tissues.
Breaking down food using oxygen to release energy for the cells
The nutrient jelly on which many microorganisms are cultured
Growing plants or other organisms on farms to supply human needs e.g. for food, clothing etc.
Single-celled or simple multicellular organisms that can photosynthesise but are not plants.
The cells of algae, single-celled or simple multicellular organisms, which can photosynthesise but are not plants.
A version of a particular gene
The tiny air sacs in the lungs which increase the surface area for gaseous exchange.
The building blocks of protein
The enzyme made in the salivary glands and the pancreas which speeds up the breakdown of starch into simple sugars.
Breaking down food without oxygen to release energy for the cells.