early study of evolution
the preserved remains, impression, or trace of any once-living thing from a past geological age
natural selection
the primary mechanism of evolution, where organisms better adapted to their environment are more likely to survive and reproduce
sexual selection
a mechanism of evolution where individuals with certain inherited traits are more likely than others to obtain mates
fossil record
the collective group of all discovered and undiscovered fossils and their placement in chronological order within rock strata
protein
large, complex molecules essential for all life
Why are fossils so important to developing a theory of evolution
they provide the only direct, physical evidence of past life, allowing scientists to travel back in time
Darwin identified three factors affecting the process of natural selection what are they
Variation, Inheritance, Competition
what does fitness mean in the terms of evolution
an organism's ability to survive, reproduce, and pass its genes on to the next generation
What sort of information can you get from a body fossil
direct information about:
what evidence is there that every organism on earth once had a commoan ancestor
based on overwhelming evidence of universal molecular, genetic, and biochemical similarities
Name 4 people whose work contributed to the study of evolution
Charles Darwin, Alfred Russel Wallace, Gregor Mendel, Jean-Baptiste Lamarck
how does natural selection help a speicies to evolve
acts as the primary filter for evolution.
how does gene flow affect a population's genetic variations
it introduces new alleles into a population to increase diversity, and it homogenizes differences between separated populations over time to prevent speciation. [1, 2, 3, 4]
how do you account for differnces between the bats wing and the dolphons flipper
homology and divergent evolution
what do microevolution and macroevolution have in common
fundamentally the same biological process
How are variations and adaptations similar
Both refer to differences in physical traits or behaviours within a species
a classmate claims that all mutations are both bad and inheritable
mutations can be neutral or even beneficial, and many are not inheritabl
is sexual selection a form of natural selection
Yes, sexual selection is a special category of natural selection
What can you say to back the claim that the fossil record supports the theroy of elolution
he fossil record supports the theory of evolution by documenting the chronological history of life, showcasing progressive change over time.
What does LUCA stand for and how did they evolve
Last Universal Common Ancestor
Which two ideas of Lamarck's contributed the most to Darwin's theory of evolution
The principle of use and disuse and the inheritance of acquired characteristics. [1, 2]
The terms mechanism and natural selection both refer to natural process what makes them different
mechanism refers to the how of evolution, and natural selection is a specific way it happens
what are the two ways in which mutations are created
spontaneously (through natural internal errors) and inducibly (through external environmental factors)
why is sudden change in the enviroment more likly to casue a species to go extinct
a rapid shift gives organisms insufficient time to develop the traits necessary to survive or reproduce in the new conditions
providing concrete mechanisms for how traits change over time