Select the correct answer from each drop-down menu. The numerous chemical reactions that occur in living cells can be disrupted if conditions are too acidic or too basic. Cells are equipped to counteract such changes with substances called , which can neutralize acidic or basic compounds that enter the system. This response keeps the cells in an optimum
range, where life functions can be carried out most effectively.

first box: chemotaxis, carbohydrates, buffers
second box: temperature, phototaxis, ph

What is the m’naughten rule? how did this rule come into existence?

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

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?