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what are the 5 steps in the scientific method
1make an observation 2develop a hypothesis 3test hypothesis with experiments and collect data 4analyze data and determine results 5make conclusions and communicate
what is a scientific law
a set of facts that allow observers to predict the behaviour of objects in certain circumstances unlikely to be disproven
what is a hypothesis
possible conclusion about an event in nature, proposed solution to a scientific problem
what are the characteristics of all living organisms
• made of cells • take in nutrients/use energy • respiration • produce waste • grow or change overtime • respond to stimuli • reproduce
what is molecule that is found in all living organisms that allow them to allow genetic info
dna
what are the main two types of cells
prokaryotic and eukaryotic
describe characteristics of prokaryotic
-have no membrane bound organelles -unicellular -dna in nucleotide -smaller ex bacteria
describe characteristics of eukaryotic
-have membrane bound organelles -can be unicellular or multicellular -larger ex people plants animals
what is convergent evolution
when two species experience the same type of selection pressures in their environment and result in having similar characteristics ex sharks and dolphins
what is divergent
a species with a common ancestor experiences different selection pressures in the same environments ex dogs and wolves