<span>Valence is defined as number of electrons that are present in the outermost orbital. Oxygen is in the 16th column of the periodic table and the total number of valance electrons is determined by units place digit of the column position which is 6 for oxygen. The outermost orbital is the high energy level and there are two in that orbit. So the valance is +2.</span>
The crossing over is a process that is essential to human genetic diversity. During the crossing over parts of the homologous chromosomes ( two chromosomes identical by structure, but different in origin, one inherited from the mother and one from the father) randomly exchange parts of their sequences.
If the crossing-over didn't exist, this would greatly decrease the genetic diversity, because the chromosomes would always bee passed o the next generations unchanged.
Answer: DNA gets replicated during S stage of interphase
prophase, metaphase, anaphase, and telophase occur in that order
four haploid daughter cells are produced
Explanation:
Vitamin C is the water soluble vitamin that can regenerate vitamin E after it has been oxidized. Because vitamin C is an acid, it is reasonably stable in acidic solutions, but in neutral or basic solutions it is easily and rapidly oxidized by dissolved oxygen. The oxidation of vitamin C, Ascorbic acid, is brought about by the loss of two hydrogen atoms as the vitamin is converted to dehydroascorbic acid. Vitamin C functions as antioxidant, assists in synthesis of collagen, a component of the connective tissue, synthesis of DNA, bile, neurotransmitters, thyroid and other hormones.
Answer:
Strawberry = $0.75
Cherry = $0.6
Explanation:
x= Strawberry
Y=Cherry
6x + 4y = 6.9 = -1.5x - 1y = -1.725 x 9 = -13.5x - 9y = -15.525
5x + 9y = 9.15
5x + 9y = 9.15
+ -13.5x - 9y = -15.525
--------------------------------
-8.5x = -6.375
x = $0.75
5(0.75) + 9y = 9.15
9y = 5.4
y = $0.6
