On average, about how many beats does the heart produce per minute?

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.

Mendel used over 28,000 pea plants in his experiment. how does this large sample size make his results more reliable? (i'm not sure about this one)