In biology, a single-access key (also called "sequential key", "analytical key", or "pathway key") is a key where the sequence and structure of identification steps is fixed by the author of the key. At each point in the decision process, multiple alternatives are offered, each leading to a result or a further choice. The alternatives are commonly called "leads", the set of leads at a given point a "couplet". If the entire key consists of exactly two choices at each branching point, the key is called dichotomous, otherwise it is described as polychromous (or, in false analogy, "polychotomous"). The majority of single-access keys are dichotomous.
I<span>t basically helps them define an animal or plant using specific defining characteristics. </span>
Answer:
Melting of glaciers which leads to flood
Explanation:
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The primary function of all lymph nodes is the production of lymphocytes, which help defend the body against microorganisms and against harmful foreign particles and debris from lymph before it is returned to the blood stream. The major clusters of lymph nodes are in six areas.
We have to make harm to the earth to make more and better creations and advances to technology. As in the over ue of oil makes better transportation. Or that gas is the soul factor of you getting to school or getting to the store. " well I get my food delivered to me." The vehicle is getting to your house to give you your every day groceries. Also the electric cars people drive is being manufactured by companies that use oil and gas to work their machines.
