chapter 1 Life and Evolution Flashcards
study for exam 1
what is science
the understanding of the natural world and the way it works
what are the three domains of organisms
Bacteria, Archaea, and Eukarya
Which two domains are more related to each other then they are to the other and
why?
Archaea and Eukarya
Which domains include organisms with prokaryotic cell organization?
Bacteria and Archaea
What are the characteristics of living things (organisms)?
Ability to reproduce and evolve. Have organization, cells, and respond to stimuli, homeostasis, acquire and convert energy, grow and develop
what are cells
unit of structure and function. smallest unit of life
What is the alternative definition of life?
Can evolve through natural selection. cells and metabolism not required.
List some of the different levels of organization evident in living systems.
- Biosphere, community, population, ecosystem
- cells, organs, tissue, molecules
What are some cons for each definition of life?
Cons; does not capture all forms of life
What are some pros for each definition of life?
Pros: grouping to make sense of systems
Why is it necessary to study how living things work at so many different levels of
organization?
to gather an understanding of how they all come together
what is evolution
the change in an organisms from its ancestor to better adapt to different environment
Gene
the sequence of DNA that codes for a trait
Allele
a particular gene
four mechanisms resulting in evolution
natural selection, gene flow, gene drift, and mutation
