Which of the following is not a property of life? A. molding and changing one's environment
B. regulating materials that enter or leave the system
C. responding to stimuli
D. maintaining a relatively constant internal condition

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Why is there more biomass at the producer level that at the consumer levels ? how does this relate to the 10% rule ?

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?