Answer:
D) Can simple organic molecules form spontaneously in an oxygen-free atmosphere?
Explanation:
Specialists are adapted to fill a very narrow niche in a habitat, and when humans or other wildlife cause their one food to change, then the specialist becomes threatened.
Iron deficiency anemia occurs when your body doesn't have enough iron to produce hemoglobin. Hemoglobin is the part of red blood cells that gives blood its red color and enables the red blood cells to carry oxygenated blood throughout your body. Causes of iron deficiency anemia include: Blood loss.
Enzymes are usually very specific as to which reactions they catalyze and the substrates that are involved in these reactions. The enzyme and the substrate possess specific complementary geometric shapes that fit exactly into one another. This is often referred to as "the lock and key" model.
Answer:
Dorsal lol, its contracts and pumps blood to the aortic arches.
