Give reasons against the following statements:
1. Cell division is important.
2. Food helps to keep us disease-free.
3. Oxygen is required by the cells of our body.
4. People with ‘AB'blood groups are called 'universal recipients'.
5. The roots of Water Hyacinth have air pockets.
Answers
1.Cell division serves as a means of reproduction in unicellular organisms through binary fission. In multicellular organisms, cell division aids in the formation of gametes, which are cells that combine with others to form sexually produced offspring.
2.One of the best disease fighting foods is dark, leafy greens, which include everything from spinach, kale, and bok choy to dark lettuces. They are loaded with vitamins, minerals, beta-carotene, vitamin C, folate, iron, magnesium, carotenoids, phytochemicals, and antioxidants.
3.Every cell in your body needs oxygen to function. ... Your body cells use the oxygen you breathe to get energy from the food you eat. This process is called cellular respiration. During cellular respiration the cell uses oxygen to break down sugar.
4.People with type AB+ blood are universal recipients because they have no antibodies to A, B or Rh in their blood and can receive red blood cells from a donor of any blood type. Plasma transfusions are matched to avoid A and B antibodies in the transfused plasma that will attack the recipient's red blood cells.
5.The mass of fine roots that hang in the water underneath the plant are dark purple or black with small, white root-hairs. The stems are spongy, bulbous stalks (called petioles) that contain air-filled tissues that keep the plant afloat.