<u>Answer:</u>
<em>Brain organoids </em>is the anatomical resemblance of the mammal brain. It is formed by culturing the stem cells in three dimensional rotational bioreactors. The main difference between the <em>organoids and real brain</em> is the real brain has the connection to outside world to mature in good manner.
The brain organoids are used to apply the <em>genuine experimentation</em> on the brain disorders. It helps in directly studying the tissues and neurons to study disease<em> present in any patients. </em>
The mitochondria is referred to as the power house of the cell, as this is there most of the cell's usable form of energy comes from, due to the process of cellular respiration.
A drought that limits food availability
The answer for 17 is the germ theory of disease
The answer for 18 is increased soil erosion
The answer for 19 is bubonic plague
The answer for 20 is regenerate
The answer for 21 is historical food of the Incas
The answer for 22 is expansion of arable land
The answer for 23 is microorganisms
The answe for 24 is pollution