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Biology
Biology Year 7
| Term | Definition |
|---|---|
| Autotrophs | Make own food by photosynthesis |
| Chemotroph | Organisms that cannot make their own energy. Must consume organic material |
| Heterotroph | Can be either autotrophs or heterotrophs. Get food by breaking down inorganic matter Don’t need sunlight (identified in ocean floors like underwater volcanos). |
| Eukaryotes | - Mostly multicellular - made of more than one cell together to make organism - Contain nucleus - Contain membrane-bound organelles - Eg plant cells, animal cells |
| Prokaryotes | Unicellular made of just one cell No membrane-bound organelles No nucleus Eg bacteria |
| Habitats | The place where and organism (living thing) lives is called its habitat. |
| Adaptations | Adaptations are characteristics that help an organism to survive and reproduce |
| Animalia | Heterotrophs Multicellular Vertebrates and invertebrates Vertebrates: Have an internal skeleton (endoskeleton) Have a backbone Invertebrates: Don’t have a backbone |
| Protists | Protists are extremely diverse Eukaryotes Mostly unicellular Reproduction: highly varied- some exclusively asexual and some sexual Energy source: Autotrophs and heterotrophs Some have a cellulose cell wall others have a cell membrane Eg pathogen |
| Plantae | Are autotrophs (producers) Have chlorophyll in chloroplasts (photosynthesis) Have a cellulose cell wall Reproduce sexually and asexually |
| Fungi | Most are multicellular, eukaryotic Cannot photosynthesise; reproduce with spores Cell walls made of chitin Can decompose dead materials Heterotrophs - feed by absorption Breaks down the food for absorption Lysotrophs- decomposers |
| Animalia | Heterotrophs Multicellular Vertebrates and invertebrates Vertebrates have an internal skeleton (endoskeleton) and have a backbone Invertebrates don’t have a backbone Reproduce sexually and asexually Eukaryotes Animal cells Cell membrane |
| Archeae | Are prokaryotes – do not have membrane bound organelles and DNA is not in a nucleus Asexual reproduction Binary fission Have different cell walls and membranes to other organisms Autotrophs Live in extreme environments |
| Bacteria | Bacteria have been found in rocks miles below the earths surface Prokaryotes Do not have membrane bound organelles Unicellular Asexual reproduction Can be autotrophic (some have chloroplasts), heterotrophic or chemotrophic Have a cell wall |
| Porifera | Heterotrophs filter feeders Have specialised cells No true tissue but have regions where similar cells will occur together Eg sponges |
| Cniderians | Either bell-shaped and mobile, like the jellyfish, or tubes anchored to one spot, like coral and sea anemones. There are 9,000 species |
| Annelids | Have no legs Have a true digestive system No hard skeleton Bodies are divided into many little segments, like rings joined together Eg worm |
| Arthropods | The largest animal phylum ~ 85% of all known animals in the world Segmented body 3 body parts (head, thorax and abdomen) Paired jointed appendages. Paired legs on each side An exoskeleton Ectothermic (Cold blooded) |
| Mollusk | Mollusks have soft bodies Don't have legs, though some have flexible tentacles for sensing their environment or grabbing things Most mollusk species grow a hard shell for protection, but their shell grows in only one or two pieces Eg snails |
| Echinoderms | Have spiny or bumpy skin Have internal skeleton (they don’t have a backbone) Eg starfish |
Created by:
Todaan
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