For each example below, indicate whether the organism is (1) endothermic or ectothermic and (2) homeothermic or poikilothermic

a. in late autumn, a box turtle burrows into soft mud and its body temperature falls to 0°C.
b. The countercurrent flow of blood in the veins and arteries of a tuna allows the fish to keep its internal temperature constant and above that of the water.
c. on a hot day, camels let their body temperature rise to be closer to that of the surrounding environment.
d. as shadow covers its resting spot, a lizard moves into the sunlight and lies close to the warm ground so that its body temperature does not change.
e. bees shiver to raise their body temperature to a constant 38°C on cool mornings.