The sodium concentration is higher outside the cell than
inside the cell and the potassium concentration is higher inside the cell than
outside the cell.
Because the sodium-potassium exchange pump moves sodium and
potassium ions in opposite directions, the pump generates concentration
gradients for these ions that are opposite in direction.
The winds that move from cold upland areas into lower elevations under the influence of gravity are described as katabatic winds. They are also called downslope winds, or gravity winds.
These winds carry high-density air from a higher elevation (<span>mountains, plateaus, and hills )</span>down a slope under the force of gravity. The katabatic winds<span> occur at night, when the highlands radiate heat and are cooled.</span>
Answer: Stratified
Explanation:
The stratified sampling can be defined as the sampling from the population which is partitioned or divided into many parts.
Here, the lady has divided her day into three parts morning, afternoon and evening.
This is a way which is used to take sample randomly from the population. therefore, Keri took 4 random sample from each part of the day.
This is a type of stratified sampling.
Geologist have identified over than 4,000 minerals
