Astudent was given a task to observe a bacterial specimen made from dilute yoghurt and sketch the shape of bacteria seen. he drew circular shapes. what kind of bacteria could these be? cocci bacilli spirilla

The answer is cocci.

There are three basic types of the shape of bacteria:
- Cocci - spheres,
- Bacilli - rods,
- Spirilla - spirals.

If a student drew a circular shape, that probably represented sphere. Therefore, the shape of seen bacteria was spherical which suggests that the bacteria must be cocci.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.