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.
Threats to the Great Barrier Reef. While the Great Barrier Reef stands as a beautiful testament to the power of natural construction, in recent years there have emerged numerous threats to the existence of the reef that loom and make its future fairly uncertain.hreats to the Great Barrier Reef. While the Great Barrier Reef stands as a beautiful testament to the power of natural construction, in recent years there have emerged numerous threats to the existence of the reef that loom and make its future fairly uncertain.