Answer:
The correct answer is - amoeba: pseudopod; euglena: flagellum; paramecium: cilia
Explanation:
Protists use different type of structures for their movement known as pseudopods, flagella, and cillia.
Pseudopods are the structures found in amoeba in which flowing of protoplasm moves the amoeba forward.
A euglena moves by strikes or whip its flagellum, that is a long appendages, like propeller of a helicopter.
Cilia are thin, very small tail-like structure that stretched outward from the of body of paramecium.
Thus, the correct answer is - amoeba: pseudopod; euglena: flagellum; paramecium: cilia
<span>Buffers.
Buffers are chemicals that maintain pH at a very specific range. This is because buffers have an equilibrium that they will maintain that is very stable. If there are too many hydrogen ions (acidic), then buffers will sweep them up and hold onto them. If there are not enough ions in the matrix (basic) then the buffers will release the hydrogen ions and maintain a stable pH.</span>
Answer:
Xylem transports only minerals and waters from the roots. Phloem transports food materials that are prepared by the green parts of the plants to other parts of the plant. ... Xylem is the dead tissues at maturity, but no cell contents. Phloem is the living tissue, but not with the nucleus.
Answer:
The correct answer is: d. loss of blood pressure and loss of oxygen-carrying capacity.
Explanation:
- Blood is a liquid connective tissue which is the major component responsible for transporting nutrients and oxygen to all the cells in the body and for removing carbon dioxide and metabolic wastes from all the cells of the body.
- When there is excessive blood loss, the total volume of blood in the body decreases far below normal. As a result of this the blood pressure (pressure applied by the blood on the walls of the arteries) decreases.
- This is because the rate at which blood is lost is far more than the rate at which it is produced.
- The decrease in blood pressure prevents the blood from travelling easily against the gravity, hence it is unable to reach all the regions of the body, thereby depriving many cells of nutrients and oxygen. The waste products are also not efficiently collected from these cells. This causes the cells in the deprived regions to die.
- Blood carries the most important component required for respiration and metabolism, that is oxygen, in association with haemoglobin molecules. Excessive blood loss causes loss of haemoglobin as well. This can cause reduction in the oxygen-carrying capacity of blood. Hence the cells of the body are unable to carry out metabolic activities properly due to the dearth of oxygen. This causes the death of cells.
- Excessive death of cells causes tissues to become non-functional and that can cause organ failure. Multiple organ failure can pose severe threat to life.
Cell tracking shows that axolotl cells in a regrowing leg retain distinct roles. ... Salamanders have the ability to regrow amputated limbs. These cells then divide and differentiate into the tissue types needed. The adult tissues are reprogrammed to make these blastema stem cells
