In 1944, reindeer were introduced to an optimal habitat on st. matthew island in the bering sea. the population grew exponentially until the winter of 1963-64, when the population dropped dramatically. the presence of may have maintain the population of reindeer.
i think it's a

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

Which could be a pathway of food through an ecosystem

This is the main structural axis of the plant that supports leaves, flowers and fruits; transports fluids; stores nutrients and produces new tissue.