Question

darwin & natural selection
name:
complete a definition for each of the following words.
word definition
evolution the change in heritable characteristics of biological populations over successive generations
natural selection the process by which organisms better adapted to their environment tend to survive and produce more offspring
adaptation a trait with a current functional role in the life of an organism that is maintained and enhanced by means of natural selection
variety the differences or diversity within a group or population which can be genetic or phenotypic
overproduction answer here
competition answer here
reproductive isolation answer here
genetic diversity answer here

1. darwins theory is sometimes calledsurvival of the fittest. is this correct. most diversity only showssurvived or unsurvived rather or your wording - what do you think fittest means here? answer here
2. darwin did not call his theory evolution. instead, he called it descent with modification. why do you think he called it that? answer here

Explanation:

• Overproduction: Organisms produce more offspring than can survive due to limited resources.
• Competition: Struggle among organisms for limited resources like food, space, and mates.
• Reproductive Isolation: Barriers that prevent inter - breeding between different populations, leading to speciation.
• Genetic Diversity: The variety of genes within a population, which provides the raw material for evolution.
• For the statement about the "tree of life": Evolutionary relationships are often depicted as a tree, showing common ancestry and divergence. All species are related through a long chain of evolutionary history.
• Darwin called his theory "Descent with modification" because it emphasized that species change over time (modification) and that all species are descended from common ancestors.

Answer:

• Overproduction: The production of more offspring than can survive due to limited resources.
• Competition: The struggle among organisms for limited resources such as food, space, and mates.
• Reproductive Isolation: Barriers that prevent inter - breeding between different populations, leading to the formation of new species.
• Genetic Diversity: The variety of genetic material within a population, which is crucial for adaptation and evolution.
• For the "tree of life" statement: All species are related through a long evolutionary history, branching out from common ancestors.
• Darwin's "Descent with modification": It emphasizes that species change over generations and share common ancestry.