The acacia tree is protected from other insects by a certain species of ant. The ants, in turn, feed on a sweet secretion produced by the tree. This type of nutritional relationship is known as A) saprophytism

B) parasitism

C) commensalism

D) mutualism

Photosynthesis converts solar energy into what type of energy?

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?