Organisms who happen to be best suited to an environment and reproduce most successfully will be consider successful in terms of natural selection.
Answer:
Explanation:
LHON (Leber Hereditary Optic Neuropathy): Is a disease that is characterized by loss of vision in young adults.
Sickle cell anemia: Is a disease characterized by production of abnormally shaped red blood cells, that is, not round in shape as normal but are 'sickle' shaped or elongated/crescent shaped.
Both diseases are heritable But LHON is caused by mutations existing in the mitochondrion thus only inherited maternally.
Sickle cell anemia is caused by mutations in the HBB gene which produces the beta subunit of hemoglobin. It is inherited from recessive genes of both parents.
The correct codes are 63267 and 69990.
The codes are given based on the lesion if it is intradural or extradural. In our case here it is extradural cystic structure so that is why it ranges between 63265 to 63268.
We also divide the section of spine depending on where the lesion is being located. Code 63267 describes laminectomy which has evacuation of intraspinal lesion which is found in the lumbar spine.
69990 code documents the use of microscope.
As the tissue heals, new scar tissue is created inside of the damaged heart tissue, thus it doesn't pump as well as healthy heart tissue
<u>Answer:</u>
A theory would be entirely replaced if a new information is discovered that contradicts with the previous theory.
Explanation:
Theories are made after being properly investigated and by having a large amount of supporting data.
But theories can be subjected to entirely change and be replaced if a new theory comes up that contradicts with the previous theory. As science is an emerging field and new researches are conducted day by day so previous theories can be wrong. However, the new theory should have enough evidence and reasoning to prove that the previous theory was wrong.
