NO LINKS Explain how a knee-j erk reflex occurs.

Describe speciation of the galapagos island finches in terms of geographic isolation

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope