Earth’s inner core is
a.
a dense ball of solid metal.
b.
a layer of molten metal.
c.
a layer of hot rock.
d.
a layer of rock that forms earth’s outer skin.

What do science, technology, and disease have to do with each other?

Select the correct answer.which scenario describes unethical lab behavior? o a. danny stores the chemicals required for his experiment in flasks and beakers.b.anna publishes the results of her experiment on the growth rate of saplings.c.jason repeatedly runs an experiment until he gets the results he desires.d. mia records her observations of an experiment precisely and accurately.

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins