Which are characteristics of living things? Check all that apply. A. have cells
B. use energy
C. reproduce
D. ligament

The diagram shows a chicken embryo and a human embryo

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

Can ground tissue do photosynthesis