Natural Selection and Evolution Flashcards
Properties of life
- cells
- evolutionary adaptation
- genetic material
- the need for energy, growth, and development
- regulation of one’s internal and external environment
- ability to reproduce
why do some people view viruses as not being a living thing?
b/c they can’t reproduce on their own
define biological evolution
changes in the genetic structures of a population over time
there is a common ancestor that can be traced back 3.7 billion years ago - True/False
True
define adaptation
traits that help an organism survive in its current environment
define natural selection
how organisms evolve & adapt to their environment in successive generations
is natural selection random?
no!
what are the requirements for natural selection?
- there must genetic variation in the population
- there must be differential reproduction
what is evolution?
genetic changes in a population
what is differential reproduction?
when the best adapted individuals will reproduce easier than less adapted ones, making the next generation stronger
what are three ways species can evolve?
- natural selection
- genetic drift
- gene flow
is evolution purpose driven?
NO!
how old is the universe?
13 billion years old
what is a fossil?
preserved remnants of organisms
what kind of rocks are fossils usually found in?
sedimentary rocks
