How do the income effect, the substitution effect, and diminishing marginal utility explain the law of demand?

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm