The smooth muscle of the digestive viscera is innervated by the: lumber splanchnic nerves cephalic plexus pelvic nerves vagus nerves

Vagus nerve.

Explanation:

Vagus nerve is the tenth cranial nerve of the nervous system and also known as pneumogastric nerve. This is the longest nerve of the autonomic nervous system.

The vagus nerve controls the parasympathetic interference of the lungs, heart and the digestive tract. The smooth muscle of the digestive viscera is innervated by the vagus nerve. This nerve has the ability to innervates both in the stomach and the lungs.

Thus, the correct answer is option (4).

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the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.