Because scientists are not the smartest people in the world and technology is not aged enough to do those kinds of things to figure it out. Also, ( I am a christian) God says in the bible that there are things that we will never understand but him.
Answer:
D
Explanation:
It's false that "cells that contain mitochondria can reproduce". The function of mitochondria is to provide energy to the cell. Like prokaryotic cells do not contain mitochondria in it because it is a membrane-bound organelle. And prokaryotic cells can divide and produce new cells.
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.
