Ahurricane destroyed all life forms on an island and washed away all the soil, leaving bare rock. in time, lichens grow in cracks in the rocks. what is occurring?
a. the habitat is not recovering at all.
b. primary succession is beginning.
c. secondary succession is beginning.

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

Restless tectonic plates move (shift) between one and fifteen centimeters per year month day minute

The diagram shows a chicken embryo and a human embryo