Answer:
Ions are an atom or group of atoms that either has a positive or negative charge. An ion with a negative charge is called an anion and one with a positive charge is a cation.
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Answer:
choanoflagellates and sponges are sister groups
Explanation:
The choanoflagellates are small unicellular organisms belonging to the Protista kingdom. These microorganisms are collared flagellates morphologically similar to the choanocyte cells of animal sponges, which have a central flagellum surrounded by a collar of microvilli. In consequence, it has been suggested that choanoflagellates may represent the closest living relatives of primitive metazoans (i.e., they are sister groups to sponges). This hypothesis has recently been supported by both molecular phylogenetic and comparative genomic analyses.
Mutation can cause instant adaptation while natural selection is the process by which adaptation occurs over a series of generations.
