In the phylogenetic tree shown here, which of the following loci represents an ancestor shared by species 1 and 2 but not by species 3? A. C
B. A
C. B
D. D

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars