Termites are insects that require the protozoan Trichonympha in their gut to synthesize the enzyme cellulase to degrade the cellulose in wood. The protozoan uses the end products of the cellulose breakdown (glucose). This is a(n) relationship.

Termites are insects that require the protozoan Trichonympha in their gut to synthesize the enzyme cellulase to degrade the cellulose in wood. The protozoan uses the end products of the cellulose breakdown (glucose). This is a(n) mutualistic relationship.

Explanation:

Mutualism is a sybiotic relationship where both organisms are helped in some way, in which populations interact to benefit eachother.

As in the cases of Termites and trichonympha, Termites requireTrichonympha in their gut to synthesize the enzyme cellulase to degrade the cellulose in wood (Termites are getting benefit) The protozoan uses the end products of the cellulose breakdown (Trichonympha also getting benefit). As both of them are benefite3d, this is mutualism.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.