Question

Table 2: growth of radish seeds after 7 days of exposure to ___________________. Concentration (%) seed #1 (mm) seed #2 (mm) seed #3 (mm) seed #4 (mm) seed #5 (mm) average length of seedling (mm)

Answer 1

Your body can then produce the most effective weapons against the invaders, which may be bacteria, viruses or parasites. Other types of T-cells recognise and kill virus-infected cells directly. Some help B-cells to make antibodies, which circulate and bind to antigens. A T-cell (orange) killing a cancer cell (mauve).