Humans are much more likely to associate snakes with danger than flowers and danger. According to the evolutionary perspective, this tendency is called .

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

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?

Are the earth's ocean floor and continents the same age geologically? why or why not?