LAST QUESTION AT LEAST LOOK

How are animals divided into groups based on the morphological trait of the number of tissue layers during development?

A) three groups: those that have four, three, or two tissue layers in their embryos
B) two groups: those that have three tissue layers in their embryos and those that have two
C) two groups: those that have two tissue layers in their embryos and those that have one

Ithink it’s around 500 million or something. kinda scary honestly but that’s just my opinion.

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.