Answer:
cattle husbandry is an important aspect of running a beef business to meet animal health and welfare standards, and for optimum animal performance. Essential husbandry practices such as castration and dehorning allow stock to be safely reared and transported to market.
Explanation:
Hope this helps!
:)
The hemoglobin holoenzyme (active enzyme) is a complex of an iron ion and 4 subunits- 2 hemoglobin alpha and two hemoglobin beta. People with sickle cell disease have mutated beta hemoglobins. The mutation is a single nucleotide exchange, that changes the 6th amino acid of protein primary struture - a Glutamic acid into Valine. This one alteration changes the tree dimentional structure of hemoglobin beta so, that it forms lond fibres that disrupt the normal circular form of the red blood cells.
A is the right answer because it is.