Paleontologists are able to apply evidence from fossils to reconstruct the habitats of ancient extinct animals, such as dinosaurs. Which type of observation or measurement of the fossils provides the most useful evidence for this task?

A. DNA analysis, which reveal evolutionary relationships with modern animals
B. muscle tissue analysis, which reveal how muscles were used
C. measurements of radioactivity, which show the age of the fossil
D. observations of bone and joint structure, which show how an animal moved

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

Where does the information about where each transcription factor binds originate?

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.