Question
Victor is an ecologist specializing in symbiotic relationships.
Victor was studying the symbiotic relationship between a species of beetles and the species of tree the beetle lived in. The beetle
obtained nectar and housing from the tree. At first, Victor believed the tree was neither helped nor harmed by the beetle, but then
Victor witnessed the beetles attacking herbivore insects that tried to feed on the tree
What relationship exists between the tree and the beetles?
A. Mutualism
B. Parasitism
C. Predation
D. Commensalism
A. Mutualism

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.

what? are the statements?

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.