evolution and speciation

Question 1

evidence for evolution

Answer 1

fossils
selective breeding
nucleotide and amino acid sequences
comparative anatomy of animals

Question 2

Charles Darwin’s theory of natural selection

Answer 2

• tendency for overproduction leads to competition, leads to regulation of population size
• individuals in population show variation
• favorable variations help adapt better, more likely to survive & reproduce
• the fittest pass on their genes while the non-fit don’t = natural selection
• large proportion will have those variations eventually
• natural selection leads to populations better adapted to their environments

Question 3

what was Lamarckism

Answer 3

was thought that changes in environment led to the usage of certain organs and they would become larger while those disused would shrink over an organism’s lifetime –> these changes that were acquired would be passed on

Question 4

evolution

Answer 4

a change in the inherited characteristics of a population