Which of the following plants is a legume which may have nitrogen fixing bacteria attached to their roots? A. Bean B. Beet C. Potato D. Cucumber E. carrot

A (bean)

Explanation:

Leguminous plants are plants that belong to the family FABACEAE and characterized by their possession of pods as fruits and ability to form nodules in their root for a symbiotic relationship to occur between nitrogen-fixing plants. An example of these leguminous plants that can be found in the option is BEAN.

Bean plant like all other legumious plants host certain bacteria called NITROGEN-FIXING bacteria in their roots in order to help them convert Nitrogen gas into usable compound forms. They, in turn produce carbohydrates for the bacteria. Leguminous plants store this nitrogenous compounds in their root nodules.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.