The snake venom contains this molecule, Disintegrin which interferes with the aggregate formation of platelets at the wound, the formation of fibrin, and therefore a blood clot, so the venom can travel more efficiently from the site of bite to the rest of the body. The main function is therefore the inhibitory action on platelet aggregation.
Answer:
Cambrian explosion
Explanation:
Cambrian explosion is a geological event that happened during the Cambrian age (541 million years ago). In this period, most of the animal phyla (including marine) appeared and their geological record is preserved in the form of fossils. The period lasted for 13-25 million years. Before this period, the organisms were very simple. They were mostly unicellular in nature and were living in the form of colonies.
The remaining three options are incorrect. They are tectonic events that reflect movement of continents in different geological times. None of them resulted in the diversification of (marine) animal phyla.
These useless leg bones are vestigial structures. It was believed that the only vertebrates existing were water creatures. Over time, they developed hips and legs as they eventually walked out of the water which later evolved to land creatures. Some of these are mammals, and they later moved back to the water. Biologists believe this to have occurred 50 million years ago.