Walking does not contribute to global warming.
Humans impact the environment in several ways. Common effects include decreased water quality, increased pollution and greenhouse gas emissions, depletion of natural resources and contribution to global climate change.
DNA contains information about ur genes.
The half life of Carbon 14 is 5730 years. By substituting the given figures to the formula x=I(1/2)^n where x is the amount of the remaining material, I is the initial amount and n is the quotient between the time elapsed and carbon 14's halflife. You will arise with the formula x=20(1/2)^1.745. You will get 5.97 mg.
Why wings (and hence flight)evolved from this point is a matter of contention among scientists; various hypotheses proposed include: Wings evolvedfrom arms used to capture small prey. ... Wings evolved from gliding ancestors who began to flap their gliding structures in order to produce thrust.