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8th GrSem 2 Finl-Sci

8th Grade Semester 2 SCIENCE Final exam

QuestionAnswer
Variations Differences between members of the same species.
Homologous Structures Refers to similar structures that related species have inherited from a common ancestor {human arm, cow leg, whale arm,} but a different function.
Darwin concluded that organisms on the Galapagos Islands Had changed over time,
How does natural selection lead to evolution? Helpful variations accumulate among the members of the species
When humans are involved in breeding and select an organism with a desired characteristic to breed, this is called? Artificial Selection
This naturalist studied organisms on the Galapagos Islands. He developed his theory of Evolution of Natural Selection, in which organisms that are better suited to their environment are more likely to survive and reproduce. Charles Darwin
Classification is the process of grouping things based on their similiarities.
taxonomy The scientific study of how organisms are classified.
Binomial Nomenclature (means two names) An unique, two-part scientific name. The organisms are placed into groups based on their observable features.
Genus is a classification grouping that contains simiar, closely related organisms.
Species is a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.
Prokaryotes Unicellular organisms whose cells lack a nucleus.
Nucleus is a dense area in a cell that contains nucleic acid.
Nucleic Acid The chemical instructions that direct the cell's activities
Eukaryote Organisms with cells that contain nuclei.
Evolution Process of change over time.
Created by: tpeterson280