Cane Toads were introduced to Australia to eat French's Cane Beetle and the Greyback Cane Beetle. The 'whitegrub' larvae of these beetles eat the roots of sugar cane and kill or stunt the plants.ane Toads were introduced to Australia to eat French's Cane Beetle and the Greyback Cane Beetle. The 'whitegrub' larvae of these beetles eat the roots of sugar cane and kill or stunt the plants.
Plasma is the clear, straw-colored liquid portion of blood that remains after red blood cells, white blood cells, platelets and other cellular components are removed. It is the single largest component of human blood, comprising about 55 percent, and contains water, salts, enzymes, antibodies and other proteins. It is composed of 90% water.
It is approximately 90% water, 7% protein, and 3% other organic and inorganic molecules and ions. The cellular components (formed elements) of the blood make up approximately 45% of the total cell volume. Approximately 99% of the cells are red blood cells (erythrocytes). The remaining cells are white blood cells (leukocytes) and platelets (thrombocytes). When mammalian whole blood is subjected to centrifugation (5000 x g, 5 min.), the cellular components collect at the bottom of the tube to form a pellet.