The kidneys filter nitrogenous from the blood.
A. O waste
B. amylase
C.
oxygen
D
nutrients

Classify the structures as homologous or analogous, depending on their structure and function.

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

Which is not displayed on the graph