En 100g. de pan blanco, 51 son glúcidos, 9g. son proteinas, 3g. son grasas, 36g. es agua y 1g son minerales. ¿ que cantdad de energia proporciona ese trozo de pan?

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.