Which of the following is an example of a body fossil? 1. Dinosaur footprint
2. Shell mold
3. Ankylosaurs bone
4. Petrified wood

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight.which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

Which experiment would most likely contain experimental bias ?

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?