The Himalayan mountains were formed as a result of A. Mantle to core collision
B. Oceanic crust to oceanic crust collision
C. Continental crust to continental crust collision
D. A subduction zone

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.

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the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.