In lateral growth, the is the source of new xylem and phloem, whereas the renews and maintains the outer layer that protects the stem. Group of answer choices apical meristem; lateral meristem cork cambium; vascular cambium secondary vascular tissue; primary vascular tissue sapwood; heartwood vascular cambium; cork cambium

Ithink it’s around 500 million or something. kinda scary honestly but that’s just my opinion.

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.

They must use the scientific method