Other important factors that are to be considered in addition to averages in precipitation and temperature in regards to describing climate would be its air humidity, cloudiness, speed of the wind and its direction, as well as the air pressure present.
Answer:
During presentation of APC-bound antigen, macrophages and dendritic cells secrete the cytokine, interleukin-1, that activates T helper cells
Explanation:
Macrophages interact with T cells in order to generate T cell activation in target organs, and are themselves activated by inflammatory messenger molecules (cytokines) produced by the T cells.
Macrophages produce toxic chemicals, such as nitric oxide, that can kill surrounding cells.
During presentation of APC-bound antigen, macrophages and dendritic cells secrete the cytokine, interleukin-1, that activates T helper cells
B. Ecosystem. By definition, an ecosystem is composed of both its abiotic and biotic factors. A community is the population of living organisms in an ecosystem, and a habitat is the generally abiotic location in which the community lives, so "ecosystem" can also be thought of as the inclusion of a community and habitat together. "Pure culture" would more closely describe a population that you might grow on a Petri dish, for instance.
Hulk syndrome, when you get mad and turn green
It decomposed and reused again