Fluorescent dyes can be added to groundwater in order to trace the waters path. A researcher placed some fluorescent dye into a stream. Which of the following is the most direct route for the dyed water to take to the ocean?
A. Via an aquifer
B. Via thermohaline circulation
C. Via a closed watershed
D. Via an open watershed

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above