What was charles darwin’s theory regarding plant and animal life?

plants and animals have gradually changed over time as a result of limited food supplies.

plant and animal species are unique and unchanging.

all plants and animals have gradually evolved over time through a process called natural selection.

the origin of most species of plants and animals can be traced back to the galápagos islands.

c. the dred scott v. sandford case,

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.