Relative to the percent of time dominating the surface of the Earth, which organisms have been here the longest? 1. eukaryotes
2. prokaryotes (single celled organisms)
3.plants
4.dinosaurs

For a to be healthy, it has to have lots of different kinds of plants and animals. all of the different types of plants and animals in an ecosystem. name four types of ecosystems from those listed in the video. b) c) d) most living things live here. all living things depend on how an ecosystem like a game of sticks? why should we build new buildings on existing land? name four extinct species from those listed in the video. b) c) d) the best way to wipe out a species is to the largest ecosystem in the world is this percent of the world is covered by water. how many of all species in the world live in the ocean? list five things you can do to increase biodiversity. b) c) d) e) how many species are we losing per hour?

Which blood cell spend most of their time in the lymphatic system?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.