A model organisms is a species that has been widely studied, usually because it is easy to maintain and breed in a laboratory setting and has particular experimental advantages. model organisms are non-human species that are used in the laboratory to help scientists understand biological processes.
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First part is explaining second part is explaining the uses)
Answer: D. Ecosystem
Explanation: The ducks are interacting with trees and algae with are all part of an ecosystem.
Color I believe because if a diamond was the same color as coal(black) you couldn’t tell a difference
Answer:
thye chromosomes are not visible
Explanation: