What is the group of compounds that build proteins called

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.