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science test lp
| Question | Answer |
|---|---|
| prokaryotes | organisms whose cells lack a nucleus (Eubacteria, Archaebacteria) |
| eukaryotes | organisms with cells that contain nuclei (protists, fungi, plants, animals) |
| autotrophs | organisms that are capable of producing their own food |
| heterotrophs | organisms that can't make their own food and obtain their energy by feeding on others |
| eyepiece or ocular lens | located at the top of the microscope. It holds the lens closest to the eye |
| high power objective | longer of the 2 lens closer to the slider. It has the highest magnification. |
| low power objective | shorter of the 2 lens close to the slide. It has the lowest magnification. |
| body tube | gives the distance needed between the eye piece and the objective. |
| course adjustment knob | moves the tube up and down. It is used to focus the image on the microscope under low or medium power by using larger motions of the lens. |
| fine adjustment knob | moves the tube up and down but only slightly. It is used to focus the image of the microscope of only high power by using very tiny motions of the lens. |
| base | holds up the entire microscope |
| arm | supports the body tube |
| nosepiece | holds the objective lens |
| mirror | reflects the light into the tube |
| classification | the process of grouping things based on their similarities |
| taxonomy | the scientific study of how things are classified |
| binomial nomenclature | unique two-part naming system discovered by Linnaeus, means "two names". |
| genus | the first word in an organism's scientific name, grouping that contains similar or closely related organisms |
| species | a group of similar organisms that can mate with each other and produce offspring |
| nucleus | the dense area in a cell that is responsible for directing the cells activities. |
| unicellular | single celled |
| multicellular | many cells |
| levels of classification | kingdom, phylum, class, order, family, genus, species |
| six kingdoms | eubacteria, archaebacteria, protists, fungi, plants, animials |
| Matthias Schleiden | stated that all plants are made up of cells |
| Robert Hooke | coined the term cells to describe boxlike structures that make up cork |
| Anton van Leeuwenhoek | first person to see one-celled organisms under a microscope, called "wee beasties" |
| Rudolph Virchow | stated that cells can only come from other living cells, become know as cell theory |
| Theodor Schwann | concluded that all animals are made up of cells |
| Focusing an image on a microscope | course adjustment knob focuses image under low or medium power, fine adjustment knob focuses image of only high power |
| Determining the magnification power of a microscope | eyepiece times objective |
| Scientists classify organisms because.. | it makes organisms easier to study |
Created by:
lfsoccer6
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