• Sinh học - Chapter 56: Conservation biology and global changeSinh học - Chapter 56: Conservation biology and global change

    Habitat loss Human alteration of habitat is the single greatest threat to biodiversity Introduced species: invasive/nonnative/exotic species Overexploitation: harvest wild plants/animals Global change: alter climate, atmosphere, & ecological systems  reduce Earth’s capacity to sustain life

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  • Sinh học - Chapter 55: EcosystemsSinh học - Chapter 55: Ecosystems

    Herbivores that eat primary producers are called primary consumers. Carnivores that eat herbivores are called secondary consumers. Carnivores that eat secondary consumers are called tertiary consumers. Another important group of heterotrophs is the detritivores, or decomposers. They get energy from detritus, nonliving organic material, and play...

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  • Sinh học - Chapter 54: Community ecologySinh học - Chapter 54: Community ecology

    Interspecific competition: resources are in short supply Species interaction is -/- Competitive exclusion principle: Two species cannot coexist in a community if their niches are identical. The one with the slight reproductive advantage will eliminate the other Resource partitioning: differences in niches that enable similar species to coexist

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  • Sinh học - Chapter 53: Population ecologySinh học - Chapter 53: Population ecology

    Clumped – most common; near required resource Uniform – usually antagonistic interactions Random – unpredictable spacing, not common in nature

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  • Sinh học - Chương 43: Review warm upSinh học - Chương 43: Review warm up

    cell body: contains nucleus & organelles dendrites: receive incoming messages axons: transmit messages away to other cells myelin sheath: fatty insulation covering axon, speeds up nerve impulses synapse: junction between 2 neurons neurotransmitter: chemical messengers sent across synapse Glia: cells that support neurons Eg. Schwann cells (fo...

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  • Môn Sinh học - Chapter 19: VirusesMôn Sinh học - Chapter 19: Viruses

    The components of a virus. The differences between lytic and lysogenic cycles. How viruses can introduce genetic variation into host organisms. Mechanisms that introduce genetic variation into viral populations.

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  • Môn Sinh học - Chapter 20: Terms to knowMôn Sinh học - Chapter 20: Terms to know

    Restriction enzymes (restriction endonucleases): used to cut strands of DNA at specific locations (restriction sites) Restriction Fragments: have at least 1 sticky end (single-stranded end) DNA ligase: joins DNA fragments Cloning vector: carries the DNA sequence to be cloned (eg. bacterial plasmid)

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  • Môn Sinh học - Chapter 21: Genomes and their evolutionMôn Sinh học - Chapter 21: Genomes and their evolution

    Make up 75% of repetitive DNA Stretches of DNA that can be moved from one location to another in genome Discovered by Barbara McClintock – corn breeding experiments 2 Types: Transposons Retrotransposons

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  • Môn Sinh học - Chapter 22: Descent with modification: A darwinian view of life - Part A: darwin & natural selectionMôn Sinh học - Chapter 22: Descent with modification: A darwinian view of life - Part A: darwin & natural selection

    Linnaeus: founder of taxonomy; binomial nomenclature Domain – Kingdom – Phylum – Class – Order – Family - Genus – Species (Dear King Philip Came Over For Good Spaghetti) Domains = Bacteria, Archaea, Eukarya Classification based on anatomy & morphology

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  • Môn Sinh học - Chapter 22: Descent with modification: A darwinian view of life - Part B: Evidence for evolutionMôn Sinh học - Chapter 22: Descent with modification: A darwinian view of life - Part B: Evidence for evolution

    Evolution is change in species over time. There is overproduction of offspring, which leads to competition for resources. Heritable variations exist within a population. These variations can result in differential reproductive success. Over generations, this can result in changes in the genetic composition of the population. Remember: Individ...

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