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Big Idea 4: Interactions in Biological Systems

Big Idea 4: Interactions in Biological Systems. 4B. Competition and cooperation are important parts of biological systems. Enzymes. How do they work again? What are they made of (what type of macromolecule)? What allows for that method to occur in the first place? What gives it shape?.

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Big Idea 4: Interactions in Biological Systems

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  1. Big Idea 4: Interactions in Biological Systems 4B. Competition and cooperation are important parts of biological systems.

  2. Enzymes • How do they work again? What are they made of (what type of macromolecule)? • What allows for that method to occur in the first place? What gives it shape?

  3. Big Idea 4: Interactions in Biological Systems 4C. Naturally occurring diversity among and between components within biological systems affects interactions within the environment.

  4. C1 - Variation in molecular units provide cells with a wider range of functions. • Why are there different chlorophylls? • What are the different types of hemoglobin? Does this change function? • Why might a heterozygote have a more advantageous genotype than that of a homozygote (hint: allele combinations and genetic expression)? • Gene duplication – old and new functions (antifreeze gene in fish).

  5. C2 - Environmental factors influence the expression of the genotype in an organism. • What is an environmental factor? • How would they influence traits (of organisms) directly? • How would they influence traits (of organisms) indirectly?How might height/weight in humans connect to these?Seasonal fur colour in arctic animals?Flower colour based on soil pH? • How might dark fur in cooler regions of the body in certain mammals connect to gene expression and the idea of a “flexible genome”?

  6. C3 - The level of variation in a population affects population dynamics • Genetic diversity is critical to avoiding extinction. Why? • What is the value in being programmed to respond differently (disease)? • Banff Springs Snail – is it worth protecting? • Allelic variation and Hardy-Weinberg – how does this help with populations?

  7. C4 - The diversity of species within an ecosystem may influence the stability of an ecosystem. • Is a more biodiverse ecosystem (natural or artificial) more or less resistant to change? • What is a keystone species and why are they important?

  8. Keystone Species • Why do keystone species only make up a small part of some ecosystems? • Why might they be disproportionate in importance to abundance? • Example of a keystone species?

  9. Factors in ecosystems • How might abiotic factors influence an ecosystem - examples? • How might biotic factors influence an ecosystem - examples? • How might producers influence an ecosystem - examples?

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