What is the meaning of development?

What are the similarities and differences in the way geologists and biologists approximate the age of the earth? justify your response in two or more complete sentences.

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements

True/false indicate whether the sentence or statement is true or false. southern africa experiences droughts and floods. select the best answer from the choices provided t f