The correct option is D.
The insulin and the glucagon hormone work together to keep the blood glucose level in the narrow range that is optimum for the health of the body. The glucagon hormone is responsible for increasing the blood glucose level when its concentration is dropping below normal while the insulin hormone is responsible for lowering the blood glucose level when its concentration is above the normal level.
The definition of a point mutation states that a mutations is a point mutation if it affects only one or few nucleotides in the DNA product. We have that DNA is read in frames of 3 nucleotides. If the starting point of one frame is changed, then all frames are changed because the frames are grouped by 3 nucleotides. We have that frameshift mutations not point mutations because a shift in the reading frame affects how the rest of the DNA is read. This is the case for insertion and deletion of a nucleotide; it changes the number of nucleotides and shifts the reading frame by 1. A missense mutation is a point mutation though; it involves substituting a nucleotide with a wrong one. It involves an error only in one place and it does not change the reading frame so it affects only one nucleotide.
C. F1 generation is all Yy (let Y be yellow and y be green). Y is dominant to y. The F2 could be YY, Yy, Yy, or yy. 3:1
Answer:
d. cells can neither be created or destroyed
First two statements were given by Schleiden and Schwann and the the third statement was given by Virchow.
