Fill in the Blanks EcosystemsOnline version The Systems of Nature by Luz María 1 survive similar human habitat living offspring reproduce species redwood environment organism bacteria An is a thing . A huge tree is an organism . A small mouse is an organism . A tiny insect is an organism . A is an organism , too . Some organisms , such as , are so small that you cannot see them . A group of very organisms is a . The organisms in a species are so similar that they can ? that is , have , or babies ? together , and their offspring can reproduce , too . A is the place where an organism lives ? its surroundings , or . A habitat provides the things an organism needs to , such as food , water , a livable temperature , and shelter .