Answer:
Water acts a carrier of food and oxygen to their body and it also carries out waste material and carbon dioxide from the body. In simple multicellular organisms like Hydra, the transportation of material from cell to cell takes place through simple diffusion.
Answer:
A,to have more available cell membrane to transfer substance such as waste in waste out of the cells
Answer:
DNA does not usually exist as a single strand, but instead as a pair of strands that are held tightly together. These two long strands coil around each other, in the shape of a double helix.
Answer:
Henoch-Schönlein purpura.
Explanation:
Henoch-Schönlein purpura may be defined as the medical condition of the inflammation of the IgA antibodies in the blood vessels. This condition causes purpuric rash.
This disease mainly occurs on the lower extremities of the body and can show reddish purple patches. This might also cause vasculature and leads to the cramping in the abdominal area of the body. The stool guaiac test is positive in this condition.
Thus, the correct answer is option (C).