What do homologous structures like the pentadactyl (five fingered) limb seen here as having different uses in animals as different as bats, birds, lizards, whales, and humans provide evolution evidence for?
check the two that are correct from the choices.
1.) they likely had common ancestors
2.) they evolved from sea creatures
3.) they responded to different selective pressures
4.) they responded to the same selective pressure
5.) they are considered living fossils that have stopped evolving

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.

D. peatlands,grassland,swamps

Youre a great person: )

The answer is macroevolution