Which complex problem is a challenge for the current global economy?

A. Loss of jobs in Great Britain

B. Increased greenhouse gas emissions.

C. Piracy in U. S. waters

D. Drought in southern Australia

Which of the following represents a negatively charged ion? of t 7

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.