What can you learn from a set of embryo drawings of vertebrates of different phyla? a) the genotype of the species of different phyla b) the phenotype of the species of different phyla c) the ecological relationships between species of different phyla d) the phylogenetic relationships between species of different phyla

This rapid change in species that rarely leaves behind fossil evidence is referred to as

What properties of a substance determine how that substance will react when combined with other substances?

If all prokaryotes on earth suddenly vanished, which of the following would be the mostlikely and most direct result? a) the number of organisms on earth would decrease by 10—20%.b) human populations would thrive in the absence of disease. c) bacteriophage numbers would dramatically increase. d) the recycling of nutrients would be greatly reduced, at least initially. e) there would be no more pathogens on earth.