Inheritance Inheritance. Metachromatic leukodystrophy is inherited in an autosomal recessive manner. This means that both copies of the disease-causing gene in each cell must have a mutation for an individual to be affected. Individuals inherit two copies of each gene - one copy from each parent.
Crown-of-thorns starfish. Crown-of-thorns starfish are one of the most damaging creatures of tropical coral reefs, particularly Australia's Great Barrier Reef. They are voracious predators that release the contents of their stomach on to the coral.
The common starfish or common sea star (Asterias rubens) is the most common and familiar starfish in the north-east Atlantic. It has five arms and usually grows to between 10â30 cm across, although larger specimens (up to 52 cm across) are known.The common starfish is usually orange or brown, and sometimes violet; deep-water specimens are pale.hen feeding on a mollusc such as a mussel, it attaches its tube feet to each shell valve and exerts force to separate them slightly. Even a gap of only 1 millimetre (0.039 in) is sufficient for the starfish to insert a fold of its stomach, secrete enzymes and start digesting the mollusc body.