Which of the following is the most likely global climate change?
a. a decrease in the overall temperature of the Earth
b. an increase in the overall temperature of the Earth
an increase in the number of cold climates
d. no change to global climate

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Ascientific idea becomes valid when it is what?

Describe characteristics of a good respitory surface