Balancing equations
H2+02->H20

H2+02--->H20

This equation is not balanced because in the reactant there are two oxygen while in the product oxygen has only one atom. For balancing oxygen we have to put value of 2 in front of water in the product but now hydrogen is imbalance so we have to put 2 in front of hydrogen in the reactant. The balance equation is given below.

2H2 + 02> 2H20

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.