← LOE 2 Test
4 Written Questions
3 Multiple Choice Questions
- 4.6 Billion Years old
- 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.
- 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.
3 True/False Questions
significance of cell membranes to origins of the earth → In the watery environment of the oceans hydrophobic molecules cling together. Experiments have shown that some lipid molecules in water will form microspheres with other chemicals trapped inside. This is believed to be the origin of the first living cell - the membrane. Cells formed bacteria and began to evolve and reproduce rapidly in the anaerobic "soup" of the ocean
plantae → Kingdom of multicellular photosynthetic autotrophs that have cell walls containing cellulose e.g. mosses or ferns.
why do scientists classify organisms → - to bring order to the study of millions of living organisms
- help communication by agreeing on unique names
- to show relationships between organisms and groups so that evolutionary pathways can be more easily established
- the help the study of living things by placing them in groups with similar characteristics