What data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries

What came first the elephent or the crocodile

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.