The substance needed for cell energy is ATP, which is short form of Adenosine Triphosphate. This is created in the mitochondria, the energy center for the cell. It is created through the process of Cellular Respiration
Answer:
50%
Explanation:
Let's make a Punnett square to represent this, with X representing our dominant allele and x our recessive.
One homozygous dominant parent = XX
One heterozygous parent = Xx
X X
X XX XX
x Xx Xx
So two out of our four outcomes are heterozygous for the trait. That means the answer is <u>B. 50%.</u>
B second year. The number of tree rings can tell how old a tree is, but the thickness of those rings also says something about the amount of water available in a given year. Wider rings mean the tree received more water that year. Thinner rings mean water was scarce.
