Answer: Because each one of them helps other organs, cells, etc.. Because everything in your body needs to work together. For example, one of the most important functions of organ systems is to provide cells with oxygen and nutrients and to remove toxic waste products such as carbon dioxide.
The question is referring to primary succession, which begins with the colonization of living organisms in an area that hasn't had any living organisms before.
This kind of succession begins with microorganisms, and plants such as lichens and mosses.
Given that a rock outcrop is a terrestrial environment, lichens (C) are most likely to be the firsts organisms.
Answer:
C) the facial nerve (VII)
Explanation:
The facial nerve (VII) is a cranial nerve. The cranial nerves are those nerves which arise from the brain. Most of the cranial nerves contain both motor and sensory neurons. Cranial nerves are connect to the various organs. Cranial nerves are associated with parasympathetic nervous system.
The facial nerve supplies nerve to many glands of the head and neck including lacrimal glands.
Thus, the facial nerve (VII) provided the stimulus to the lacrimal gland that cause tear while chopping oninons.
Fungi are eukaryotic and saprophytic microorganisms that grow on dead and decaying matter. These organisms release digestive enzymes that break down leaves, fruit and other organic material into simple molecules. These can grow on wood, clothes, food, fruits, leather shoes, etc by breaking down complex organic matter into simpler forms with the help of extracellular digestive enzymes such as cellulases, proteases, phosphatases, etc.