Which of the following is considered a primary lymphoid organ?
lymph node
spleen
bone marrow
lymph node and spleen
lymph node, spleen, and bone marrow

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.