Answer: option A - an increase in the height of the sound wave
Explanation:
Loud sounds are carried by waves that have a higher amplitude (height between peak and trough) than quiet sounds. The bigger the amplitude of a sound wave, the louder it sounds to our ears.
So, the perceived increase in the volume of sound is best explained by an increase in the height of the sound wave
Answer: Erythropoiesis is the process which produces red blood cells (erythrocytes). It is stimulated by decreasing oxygen in circulation detected by the kidney which then secrete erythropoietin that proliferate and differentiate red blood precursors & produce red blood cells.
Explanation: The use of erythropoietin to boost red blood cells is called blood doping. The more red blood cells are present in the body, the more the energy expenditure and the slower you will burn calories during physical activities.
Answer: Cell division
Explanation:
Cell division can be define as the process by which the parent cell divides into daughter cells. It is the part of the cell cycle.
In multi-cellular organisms there is specialization of cells for performing different functions thus cell division is required for this purpose the cells divide and a mass of cell or tissue performs functions. These functions are necessary for the growth of the organisms.
In uni-cellular organisms the functions are few. Thus a single cell divides to produce multiple cells to produce the offspring. It is the mode of asexual reproduction.
Usee socratic the app trust me it’ll tell you i use it for all my hw and tests
