← LOE 2 Test
4 Written Questions
3 Multiple Choice Questions
- Kingdom of the most complex organisms; multi-cellular, heterotrophic, lack rigid cell walls, mobile, tissues in internal organs, sensory organs, nervous system e.g. humans.
- 4.6 Billion Years old
- The procaryotic cell has a nuclear region, but no true nucleus and ribosomes in cytoplasm, but no membrane bound organelles, they are smaller, older and live in extreme conditions. The Eucaryotic cell has a nucleus and other organelles mad from or bound by membranes and is bigger and lives in environments with plants and animals.
3 True/False Questions
significance of cell membranes to origins of the earth → When stromatolites began performing photosynthesis in stromatolites, it changed the air from anoxic to oxic. This meant life could never again start up the way it did, ,many anaerobic bacteria died, the ozone layer developed and cellular respiration began occuring.
importance of fossils → By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments and even predict what may happen in the future.
protists → a kingdom of eukaryotic organisms. They are heterotrophic and digest their food externally, absorbing nutrient molecules into their cells. Yeasts, molds, and mushrooms are examples.