Answer:
Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed.
At the interface of two fluids, there is a difference in pressure. This leads to the existence of a surface force, the surface tension, that shapes the fluid.
The surface tension of water is roughly 72 dynes/cm,
However, that is highly dependant on the characteristics of the considered material (physical and chemical), and thus all fluids (and thus liquids) do not have the same surface tension.
Answer:
Atmospheric conditions influence the weather patterns by making very high or low changes in the temperature and air pressure.
Answer:
The four postulates of natural selection are-All individuals in a population have equal reproductive success,Individuals in a population vary in the traits they possess,Survival and reproduction success are variable among individuals in a population,Some trait differences are heritable.
Explanation:
Natural selection is a process by which those organisms that adopt the environmental condition have the chance to increase in number and those organisms that are unable to adopt the environmental condition will be less favorable.
Natural selection have 4 conditions that are Reproduction,Heredity,Variation in fitness of organisms and variation in traits of the individuals.
Reproduction-is a condition which is important for evolution as the parent produce offspring that will survive.
Heredity-is a kind of mechanism when the transmission of genetic information takes place from parent to offspring.
Variation is important as it considers the fitness of organisms as they have different heritable factors.