Which of the following provides evidence that all living things share common ancestors? 1.Fossil record
2.Analogous Structures
3.Homologous Structures
4.Similarities in DNA sequences

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?

Astudent wants to compare the amounts of co2 given off by yeast provided with different amounts of sugar. the student places a balloon over each container to catch the released co2. which observation is a qualitative observation the student can make?

Lydia is walking in the woods at night to observe owls. she hears a rustling behind a tree, which startles her and causes her body to go into a fight or flight response as the sympathetic nervous system is activated. what is likely to happen to her digestive system during this response? a. the enteric nervous system will speed up digestion to use energy. b. the peripheral nervous system will speed up digestion to use energy. c. the peripheral nervous system will slow down digestion to conserve energy. d. the enteric nervous system will slow down digestion to conserve energy.