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The heart muscle is myogenic, meaning that it is able to initiate its own contraction. The wall of the right atria has a region of specialised fibres known as the sinoatrial node ...
A pathogen is a harmful organism that causes infectious diseases. There are many types of pathogens: bacteria, fungi, viruses, protoctists, worms and insects. They allow diseases to be transmitted from pe...
Bonding between this compound will be ionic as potassium is a metal and sulphur is a non-metal.Therefore electrons are transferred from potassium to sulphur as metals must lose electrons to gain a full ou...
CORRESPONDING TEXT IN PAPER: Jedes Jahr verlassen immer mehr junge Spanier ihre Heimat. Viele von ihnen kommen nach Deutschland, weil mehr als die Hälfte der jungen Spanier zwischen 15 und 24 keine Arbeit...
The ancestors of modern Lemurs arrived in Madagascar and spread across the island. At some point after this, the once contiguous population became fragmented into three separate populations. Each of these...
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