Answer:
I'm presuming you mean the three different subcatagories or taxa as there around 25/26 mammalian orders. The three taxa are - Prototheria or Monotreme = Mammals that lay eggs Metatheria Marsupial = Mammals with external development pouches.
Explanation:
The answer is B. artificial selection. Artificial selection is . a process in the breeding of animals and in the cultivation of plants by which the breeder chooses to perpetuate only forms that have certain desirable inheritable characteristics (such as, in this case, cows that produce the most milk).
I believe lactic acid fermentation is used for all three!
<u>Answer:</u>
The layer of the rock is older than the layer above it and younger than the layer below it.
<u>Explanation:</u>
According to the law of superposition, the layer which is above is always younger than the layer below it. This law is based on the very common fact that the older layer had to lay down first and then a new layer formed above it. This process is used to determine the relative age of the rocks.
