This 54-slide package of teaching PowerPoint presentations covers all of 4.C (Diversity) in the AP Biology (2015) curriculum. Each slide includes the 'Essential Knowledge' being covered as well as key terms that students should make note of (editable).
Unit 4.C includes four sections:
• 4.B.1 - Molecular Variation
• 4.B.2 - Genotype Expression
• 4.B.3 - Population Variation
• 4.B.4 - Ecosystem Stability
The presentations themselves contains minimal information as they are intended to be used with teacher guidance. There are 'Video' slides throughout which link to relevant and informative YouTube content. The slides are formatted to be visually pleasing and to also print well for handouts or revision. Please see the preview file (first 8 slides) for an idea of the aesthetic and level of detail in the presentation. The relevant 'Essential Knowledge' can be found below.
I have had success using these presentations to review topics after students have been exposed to the material at home. I typically have the class read relevant material (book, site, etc.) and then watch the videos the day before introducing a topic. During the class period, I use the slides to structure the discussion around the AP Bio Essential Knowledge objectives. The remaining class time is spent reinforcing the knowledge or working on activities geared toward the 'Learning Objectives'.
**These presentations are based on the AP Biology Course Guide and does not follow any textbook
As always, please let me know if you have any suggestions for improvements. These are always a work in progress!
Dokimi AP Biology PPTs:
Big Idea 1 - Evolution (BUNDLE)
• 1.A - Evolution (all)n
1.A.1 - Natural Selection
1.A.2/3 - Phenotypic Variation & Genetic Drift
1.A.4 - Evidence for Evolution
• 1.B - Phylogeny
• 1.C - Speciation
• 1.D - Origin of Life
Big Idea 2 - Matter
• 2.A - Energy & Matter (all)
2.A.1 - Energy Input (free)
2.A.2 - Energy Capture & Storage
2.A.3 - Environmental Exchanges/Interaction
• 2.B - Cell Membrane
Big Idea 3 - Information
• 3.A - Inheritance (all)
3.A.1 - DNA & RNA
3.A.2 - Cell Division
3.A.3 - Mendelian Patterns
3.A.4 - Non-Mendelian Patterns (free)
Big Idea 4 - Interactions & Complexity (BUNDLE)
• 4.A - Interactions (all)
4.A.1 - Biomolecules
4.A.2/3/4 - Differentiation, Organelles & Organ System Interactions
4.A.5/6 - Community & Ecosystem Interactions
• 4.B - Competition & Cooperation
• 4.C - Diversity
4.C.1 - Molecular Variation
Variation in molecular units provides cells with a wider range of functions.
a. Variations within molecular classes provide cells and organisms with a wider range of functions.
- Different types of phospholipids in cell membranes
- Different types of hemoglobin
- MHC proteins
- Molecular diversity of antibodies in response to an antigen
b. Multiple copies of alleles or genes (gene duplication) may provide new phenotypes.
- 1. A heterozygote may be a more advantageous genotype than a homozygote under
particular conditions, since with two different alleles, the organism has two
forms of proteins that may provide functional resilience in response to environmental
- 2. Gene duplication creates a situation in which one copy of the gene maintains
its original function, while the duplicate may evolve a new function.
4.C.2 - Genotype Expression
Environmental factors influence the expression of the genotype in an organism.
a. Environmental factors influence many traits both directly and indirectly.
- Height and weight in humans
- Flower color based on soil pH
- Seasonal fur color in arctic animals
- Sex determination in reptiles
- Density of plant hairs as a function of herbivory
- Effect of increased UV on melanin production in animals
b. An organism’s adaptation to the local environment reflects a exible response of its genome.
- Darker fur in cooler regions of the body in certain mammal species
- Alterations in timing of owering due to climate changes
4.C.3 - Population Variation
a. Population ability to respond to changes in the environment is affected by genetic diversity. Species and populations with little genetic diversity are at risk for extinction.
- California condors
- Black-footed ferrets
- Prairie chickens
- Potato blight causing the potato famine
- Corn rust aects on agricultural crops
- Tasmanian devils and infectious cancer
b. Genetic diversity allows individuals in a population to respond differently to the same changes in environmental conditions.
- Not all animals in a population stampede.
- Not all individuals in a population in a disease outbreak are equally affected;
some may not show symptoms, some may have mild symptoms, or some may be naturally immune
and resistant to the disease.
c. Allelic variation within a population can be modeled by the Hardy-Weinberg equation(s).
4.C.4 - Ecosystem Stability
The diversity of species within an ecosystem may influence the stability of the ecosystem.
a. Natural and artificial ecosystems with fewer component parts and with little diversity among the parts are oen less resilient to changes in the environment.
b. Keystone species, producers, and essential abiotic and biotic factors contribute to maintaining the diversity of an ecosystem. The effects of keystone species on the ecosystem are disproportionate relative to their abundance in the ecosystem, and when they are removed from the ecosystem, the ecosystem oen collapses.