Answer:
The most precise evidence for dinosaur fossils would be found within the fossils themselves. The evidence that has been gathered from these fossils includes soft tissues, red blood cells, collagen, and even DNA fragments. Additionally dinosaur fossils have been found to be rich in carbon 14. This radioactive substance has a half-life of 5730 years. It seems that the evidence equates to dinosaur fossils being less than 50,000 years old.
Explanation:
Answer - Arteries are blood vessels that are responsible for carrying oxygen-rich blood away from the heart to the rest of the body while veins are blood vessels responsible for carrying blood low in oxygen from the body back to the heart for reoxygenation.
Because there's less herbivore resources to go around
During meiosis the male XY sex-chromosome pair separates and passes on an X or a Y to separate gametes; the result is that one-half of the gametes (sperm) that are formed contains the X chromosome and the other half contains the Y chromosome. ... The X chromosome, being larger, carries many more genes than does the Y.
In some cases, massive destruction of red blood cells caused death. This drug-induced hemolytic anemia was shown 30 years later to be caused by a deficiency of glucose 6-phosphate dehydrogenase, the enzyme catalyzing the first step in the oxidative branch of the pentose phosphate pathway.
in short terms, glucose 6-phosphate dehydrogenase