"since records began in 1958, the carbon dioxide concentration in the atmosphere has decreased."a. trueb. false

False

Explanation:

Carbon dioxide is an important greenhouse gas found in the atmosphere. Since the start of the Industrial Revolution, record of the concentration of carbon dioxide in the atmosphere have been said to increase by more than about 45%. Recent records indicate concentration to be highest, of which has been linked to the cause of global warming and climate change.

Human activities such as burning of fossil fuels, bush burning, deforestation have lead to a remarkable increase in the concentration of carbon dioxide in the atmosphere.  

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands