Answer:
All pieces of land on Earth were once joined together.
Earth's surface is covered with continental plates.
All the continents are moving at a slow pace.
Explanation:
According to the Wegener, at first all continents are fuse together make a supercontinent which later broke apart into seven large masses of land. All the continents are moving away from each other at very slow rate. The surface of earth is covered with continental plates that is responsible for the breaking and movement of continents from each other.
True, viral STIs are not curable and can only be controlled with medications
Answer:
RBCs' production is controlled by erythropoietin.
Mature RBCs are released into the bloodstream after approximately seven days RBCs are produced in the bone marrow
Explanation:
The hormone erythropoietin is produced and released in the bloodstream by peritubular interstitial cells of kidneys. The function of erythropoietin is to increase the number of the precursors of red blood cells and thereby to stimulate the production of red blood cells in the bone marrow. When the oxygen supply to body cells is reduced, the hormone erythropoietin stimulates the development of proerythroblasts into reticulocytes and thereby increases the RBC production.
RBCs are produced by the process of erythropoiesis and take about seven days to become mature and to be released in circulation to serve the function of oxygen delivery. The maturation of RBCs also includes the loss of most of the organelles such as the nucleus and mitochondria to accommodate hemoglobin protein. The life span of circulating RBCs is about 100-120 days.
Some of the light energy is converted to chemical energy. During this process, a phosphate is added to a molecule to cause the formation of ATP. ... The ATP then provides energy to some of the other photosynthetic reactions that are causing the conversion of CO2 into sugars. During photosynthesis, energy from sunlight is captured and used to produce sugar molecules.
