According to finding of scientist, the earth is roughly 4,600 million years old. then the non abundant fossil that they dated was about 3,600 million years old. so the fraction or percent of <span>geologic time is :
3,600 / 4600 = 0.78 or 78 % of earth geologic time</span>
There were more dark moths around factories because trees were darker near factories because of pollution. More light moths were found in the country away from the factories, in the forests with no factory pollution
The atria and ventricles work together, contracting and relaxing to pump blood out of the heart in a coordinated and rhythmic fashion. As blood leaves each chamber of the heart, it passes through a valve.
Answer:
•Alfred Wegener gathered evidence that the continents had moved around on Earth's surface
.
•The evidence for continental drift included the fit of the continents; the distribution of ancient fossils, rocks, and mountain ranges; and the locations of ancient climate zones.
Answer:
The storage of calcium ions. (Ans. A)
Explanation:
T-tubule are the extension part of the cell membrane (which contains a large number of transporters, pumps & ion channels) which penetrate the central skeletal & cardiac muscle cell.
The primary function of the transverse tubule (T-tubule) is to storage and providing calcium ions for muscles contraction. T-tubule allows rapid movement of the action potential, & play a very important role in releasing cellular calcium concentration. Through this process, transverse tubule allows heart muscle cell contract forcefully by calcium (synchronizing) release from the cell.