What is the mutation caused by the addition of a nucleotide to an already existing gene sequence called?

Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear

What is the difference between topsoil and clay?

Match the order of the levels of organization in nature with the correct description. example: atoms are fundamental units of matter= level 1levels- 2,3,4,5,6,7,8.now what levels are these? population consists of organismscells consist of moleculesecosystems consist of communities interacting with there environmentmolecules consist of atomsthe biosphere consist of all ecosystems on earthcommunities consists of populationorganisms consist of cells