How do bacteria help the nitrogen cycle? They release nitrogen in the air. Bacteria build plant protein. They make nitrogen chemicals which plants can use. Bacteria help to release chemicals from dead plants and animals.

Sam and ben have discovered some strange animals living in the woods behind their house. ben is excited because he believes they are marsupials, an animal he's never observed in the wild before. his brother is sure it is not. what feature should the boys consider in deciding whether the animals are marsupials?

Japan’s key exports to africa and southwest asia are mostly a) raw materials. b) human capital. c) manufactured items. d) agricultural products.

What are the most populous and least areas of russia and why are some areas more heavily populated than others