glucose, a carbohydrate, readily dissolves in your bloodstream. cholesterol and
triglycerides-both lipids--are packaged inside the waterproof spaces of lipoproteins
so they can enter the bloodstream. use the molecular models from the activity along
with those in your textbook to compare the chemical compositions and structures of
glucose, cholesterol, and triglycerides. construct an explanation for how the
compositions and structures of these carbon-based molecules are related to the way
they interact with your bloodstream.

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:

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.