(2) (Of, or pertaining to) An organism that expresses the dominant gene (or allele). (ecology) (Of, or pertaining to) An organism or group of organisms having the most considerable influence or control in its ecological community among other organism.
Relevance. Rating Newest Oldest. Best Answer: Geological Period that lasted the longest: The Precambrian Era The Precambrian Era is the longest geological era beginning 4.5 billion years ago and lasting approximately 4 billion years. The Precambrian era is generally separated into two eons the first of which being the Archaean Eon.
Answer Wiki. The Mesozoic (literally middle life) Era lasted from around 252.2 million years ago to around 66.0 million years ago: i.e. for approximately 186.2 million years. The boundaries of the era are the PermianâTriassic extinction event (the most sever...