Answer:
Ptolemy included epicycles in his orbits.
Explanation:
Ptolomy's model of the solar system was geocentric, where the sun, moon, planets, and stars all orbit the earth in perfectly circular orbits. The problem with perfectly circular orbit around the Earth is that they do not explain the occasional backward motion, or retrograde motion, of the planets.
The Greeks insisted that the motion of the planets be perfectly circular. Ptolemy modeled the planets making small circles around a point that orbited the Earth. These smaller circles were called epicycles, and they allowed the planets to move backward relative to the background stars.
Answer: Option A.
Cause clot dissolution to proceed faster.
Explanation:
Plasminogen activator is a substance that activates plasminogen to plasmin. Plasminogen activator is a serine proteases which catalyze the activation of plasminogen. The damaged blood tissue releases tissue plasminogen. The plasmin is important to break fibrin polymers that is formed during clotting of the blood. Increased plasminogen levels cause blood clots to dissolve faster.
Answer:
High amounts of melanin.
Explanation:
Dark-pigmented people living in high sunlight environments are at an advantage due to the high amounts of melanin produced in their skin. The dark pigmentation protects from DNA damage and absorbs the right amounts of UV radiation needed by the body, as well as protects against folate depletion.
Answer:
A supply of all amino acids remain in amino acid pools in your blood and inside your cells.
Explanation:
