Consider the model of temperature regulation in humans. instead of an increase in temperature, as seen here, imagine that the human body temperature drops. how would this model most likely change in response to a drop in temperature? a) signals from the hypothalamus would stop. b) the blood vessels move up and down in the skin. c) vasodilation would be replaced by vasoconstriction. d) the vasodilation step in the model would include shivering.

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explanation:

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many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.