Life & Scientific Method
Life emerges at the level of...
What is the cell?
the process in which an organism will either keep or delete certain traits that are in favor of its environment.
What is natural selection?
the smallest individual units that have properties of an element
What is atoms?
molecules that have the same molecular formula (chemical symbols and subscripts indicating the numbers of atoms in a molecule or compound), but different structures
What are structural isomers?
The three domains of life
What is bacteria, archaea, and eukarya.
why there is no "goal" involved when natural selection results in evolutionary change of a population?
What is because the world and environment are forever changing therefore natural selection will need to continue its process as well.
the three subatomic particles
What are protons, neutrons, and electrons?
the 4 classes of biomolecules are...
What are proteins, lipids, carbohydrates, and nucleic acids?
main requirement for a scientific hypothesis
What is must be testable?
the process of the cyanobacteria releasing more oxygen than the earth can absorb.
What is oxygen catastrophe?
atoms gain or lose electrons to attain the most stable electron shell configuration (max of 8 electrons in the outermost shell)
What is the octet rule?
proteins that facilitate the chemical reactions needed for cellular work
What are enzymes?
has an effect on the dependent variable
What is the Independent variable?
5 ways forces that cause populations to change their frequencies of traits.
What is natural selection, mutation, genetic drift, migration, and non-random mating?
how much an atom pulls electron
What is electronegativity?
a chemical reaction where a molecule temporarily changes its structure by moving a hydrogen atom to a different position within itself
What is tautomeric shifts?
the manipulated variable that is measured and is expected to change
What is the dependent variable?
the process that takes the half-lives of nuclei to determine the age of a particular object
What is radiometric dating?
Which four elements are most important and prevalent to life on Earth?
What are Oxygen, Carbon, Hydrogen, and Nitrogen?
Changes in temperature, salinity, and pH
What is Protein Denaturation?