Que características naturales favorecen el desarrollo de la agricultura

In what way are cities microclimates?

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins