Virginia Grade 7 Science Online Center

LS · Life Science

• LS.2.aCells, Body Systems, and GeneticsThe development of the cell theory demonstrates the nature of science
• LS.2.bOrganism Needs, Structures, and Life CyclesCell structure and organelles support life processes
• LS.2.cOrganism Needs, Structures, and Life CyclesSimilarities and differences between plant and animal cells determine how they support life processes
• LS.2.dCell Division Mechanism Growth Reproduction Mitosis Cell CycleCell division is the mechanism for growth and reproduction
• LS.2.eCellular Transport Osmosis Diffusion Important Life Processes DiffusionCellular transport (osmosis and diffusion) is important for life processes
• LS.3.aCells, Body Systems, and GeneticsPatterns of cellular organization support life processes
• LS.3.bOrganism Needs, Structures, and Life CyclesUnicellular and multicellular organisms have comparative structures
• LS.3.cOrganism Needs, Structures, and Life CyclesSimilar characteristics determine the classification of organisms
• LS.4.aOrganism Needs, Structures, and Life CyclesPhotosynthesis is the foundation of virtually all food webs
• LS.4.bOrganism Needs, Structures, and Life CyclesPhotosynthesis and cellular respiration support life processes
• LS.5.aEcosystems, Food Webs, and Matter FlowMatter moves through ecosystems via the carbon, water, and nitrogen cycles
• LS.5.bEcosystems, Food Webs, and Matter FlowEnergy flow is represented by food webs and energy pyramids
• LS.5.cEcosystems, Food Webs, and Matter FlowRelationships exist among producers, consumers, and decomposers
• LS.6.aEcosystems, Food Webs, and Matter FlowRelationships exist between predators and prey and these relationships are modeled in food webs
• LS.6.bEcosystems, Food Webs, and Matter FlowThe availability and use of resources may lead to competition and cooperation
• LS.6.cSymbiotic Relationships Survival Different Species Symbiotic RelationshipsSymbiotic relationships support the survival of different species
• LS.6.dNiche Each Organism Supports SurvivalThe niche of each organism supports survival
• LS.7.aEcosystems, Food Webs, and Matter FlowBiotic and abiotic factors define land, marine, and freshwater ecosystems
• LS.7.bOrganism Needs, Structures, and Life CyclesPhysical and behavioral characteristics enable organisms to survive within a specific ecosystem
• LS.8.aOrganism Needs, Structures, and Life CyclesOrganisms respond to daily, seasonal, and long-term changes
• LS.8.bEcosystems, Food Webs, and Matter FlowChanges in the environment may increase or decrease population size
• LS.8.cEcosystems, Food Webs, and Matter FlowLarge-scale changes such as eutrophication, climate changes, and catastrophic disturbances affect ecosystems
• LS.9.aChanges Habitat Disturb Populations Coral Reef Biodiversity HumanChanges in habitat can disturb populations
• LS.9.bEcosystems, Food Webs, and Matter FlowDisruptions in ecosystems can change species competition
• LS.9.cEcosystems, Food Webs, and Matter FlowVariations in biotic and abiotic factors can change ecosystems
• LS.10.aCells, Body Systems, and GeneticsDNA has a role in making proteins that determine organism traits
• LS.10.bCells, Body Systems, and GeneticsThe role of meiosis is to transfer traits to the next generation
• LS.10.cCells, Body Systems, and GeneticsPunnett squares are mathematical models used to predict the probability of traits in offspring
• LS.11.aOrganism Needs, Structures, and Life CyclesMutation, adaptation, natural selection, and extinction change populations
• LS.11.bOrganism Needs, Structures, and Life CyclesThe fossil record, genetic information, and anatomical comparisons provide evidence for evolution
• LS.11.cOrganism Needs, Structures, and Life CyclesEnvironmental factors and genetic variation influence survivability and diversity of organisms