yes, coral polyps are a keystone species. it would be a keystone species because it is important in order for the coral to thrive.
Answer:
sarcoplasmic reticulum deteriorates and ATP production is stopped
Explanation:
Rigor mortis is the third stage of death characterized by stiffening of joints and muscles in body. The stiffening occurs because muscles are not able to return to the relaxed state. There are two reasons for rigor mortis, depletion of ATP and increase in calcium concentration in cytosol. Due to these factors the actin-myosin crossbridge is not able to break and the muscles remain in contracted state.
Sarcoplasmic reticulum deteriorates and calcium is released into the cytosol. Sarcolemma ( covering of muscle fiber ) also breaks down releasing extra calcium into the cytosol. Calcium is responsible for formation of actin-myosin cross bridge and when its concentration increases the bridge is formed continuously leading to stiffening of muscles and joints.
The tundra has little variation in temperatures
<span>Natural selection is what allows a population to adapt because the animals that adapt are the ones that mate and pass along their genes. Without natural selection, evolution or adaptation would not be able to occur.</span>
The answer would most likely be D. Mass Extinction
