Answer:
Because sickled cells restrict blood flow, individuals can periodically experience swelling and extreme pain in any body organ or joint. This can last for hours or weeks. Sometimes permanent damage can occur to organs deprived of oxygen and nutrients
Explanation:
Red blood cells are designed to pick up oxygen in the lungs and transport it throughout the body via the circulatory system. Their donut-like shape and water-balloon-like flexibility allows them to pass through even the tiniest blood vessels.
Sickle cell anemia is a hereditary condition that causes some red blood cells to distort into rigid crescent moon shapes.
Normal red blood cells can flow freely through blood vessels. Sickled cells get stuck in the blood vessels and cause blockages.
Answer: green algae
Explanation:
Alga is classified as plants as it contains chlorophyll. But, it lacks true stem, roots etc. It is a large group of aquatic plants. Algae could be unicellular, multi cellular or colonial.
A unicellular contains single cell where as multi-cellular consists of of many cells. Kelp, Plankton and Brown algae are multi-cellular where as green algae can be either unicellular or multi-cellular.
The left atrium lacks a group of pace maker cells.
Answer:
A) Anaphase I
Explanation:
During the Anaphase I of meiosis, the pairs of homologous chromosome split up. During this phase sister chromatids of each pair is formed and start moving towards the opposite poles. By the end of anaphase out of each pair of sister chromatids , reaches to the poles of the spindle fibre. During the metaphse of meiosis the chromosomes start their movements and arrange themselves between the poles and the equator of the spindle.
