Which of the following came first in the scientific study of living organisms?
a. light microscope
b. cell theory
c. electron microscope
d. model of dna

A. Light microscope

The light microscope is said to have been invented in the late 16th century, hundreds of years before any of the other mentioned options. The cell theory was developed in the 1830s, while the discovery of the DNA molecule, as well as the creation of the electron microscope, occurred in the mid-1900s. 

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.