According to the frontier ethic, saving endangered animal species may be considered foolish because . new species will take their place extinctions occur as a natural process animals serve no human purpose animals cannot be controlled

How does friction with the atmosphere affect the speed of an artificial satellite

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?