If both of them were travelling anti parallel to each other. (parallel but in opposite directions)
There are choices for this question namely:
<span>A) B cells produce IgE antibodies
B) B cells release cytokines
C) cytotoxic T cells present the class II MHC molecule-antigen complex on their surface
D) helper T cells release cytokines
The correct answer is "helper T cells release cytokines". Cytokines are released by helper T cells when B cells attach to them via receptors. These T cells "help" these B cells to differentiate by secreting certain cytokines. When B cells differentiate, they are converted to plasma cells and able to secrete antibodies to the antigen presented to the T cells. </span>
It is a tectonic plate, it is constantly moving and shaping the Earth's crust.
This isn't possible except you have a system where there isn't competition and the survival of the fittest in the aspect of the food chain
I think the answer is the Deep zone.
