Eukaryotic kingdom dichotomous key 1a. no cell 1b. cell to 2 2a. has chloroplasts and a large central 2b. no chloroplasts or large central to 3 3a. has flagella and 3b. no flagella and question: using the dichotomous key, identify the kingdoms of cells a-d, and explain how you know the identity of each.

Dichotomous Key for Animal and Plant Cell, this is a kind of messy key, but it will give you an example of what to do. You're Welcome!
If you need more help with cytology, just ask me, I'm a A+ in Biology. 
1. Has a cell wall                                                           Go to number 2
    Has no cell wall                                                          Go to number 3
2. Has a central vacuole                                                Go to number 4
    Has no central vacuole                                        Than it can't be a plant or animal cell
3. Has a cell membrane                                                  Go to number 5 
    Has no cell membrane                                All eukaryotic cells have a cell membrane
4. Has chloroplasts
Has to be a plant cell because it has a cell wall, a central vacuole and chloroplasts 
    Has no chloroplasts                                     Than it can't be a plant or animal cell
5. Has a nucleus                                                          Go to number 6  
    Has no nucleus                                            Than it can't be a plant or animal cell
6. Has more than one lysosome                    Has to be an animal cell because it has no cell wall or central vacuole or chloroplasts and it has more than one lysosome. 
   Has only one lysosome                                    Plant cells only have one lysosome

Environmental science studies the interactions between the physical, chemical, and biological components of the environment, including their effects on all types of organisms. earth science (also known as geoscience), is an inclusive term for all sciences related to earth (geology, meteorology, oceanogr maphy, etc).  although environmental and earth science cover essentially the same material, environmental science places greater emphasis on the biological realm, while earth science places greater emphasis on the physical realm.    environmental and earth science study the interactions of four major systems or “spheres” (figure 8.6).  the  geosphere  consists of the core, mantle and crust of the earth.the  atmosphere  contains all of the earth’s air and is divided into troposphere, stratosphere, mesosphere, thermosphere and ionosphere.the  hydrosphere  contains all of the solid, liquid and gaseous water on earth, extending from the depths of the sea to the upper reaches of the troposphere where water is found.  ninety-seven percent of the hydrosphere is found in salty oceans, and the remainder is found as vapor or droplets in the atmosphere and as liquid in ground water, lakes, rivers, glaciers and snowfields.  the  biosphere  is the collection of all earth’s life forms, distributed in major life zones known as biomes:   tundra, boreal forest, temperate deciduous forest, temperate grassland, desert, savannah, tropical rainforest, chaparral, freshwater, and marine.although the four systems have their unique identities, there is substantial interaction between them.  environmental scientists study the effects of events in one sphere on the other spheres. for example, a volcanic eruption in the geosphere may cause profound direct and indirect effects on the hydrosphere, atmosphere and biosphere as follows: example 1 (volcano)    on may 18, 1980, mount saint helens, in the state of washington, erupted.  this event altered the surrounding environment, and provided scientists with an opportunity to study the effects of volcanic eruptions on the geosphere, hydrosphere, atmosphere and biosphere.  such studies are vital because volcanic eruptions will continue to occur, and will have increasing impact on humans as people continue to settle lands closer to dormant volcanoes. the following are but a few of the myriad of interactions resulting from a volcanic