Exam (elaborations)
IB ESS Unit 3 Revision questions well answered to pass
- Course
- Institution
IB ESS Unit 3 Revision questions well answered to pass
[Show more]
Content preview
IB ESS Unit 3 RevisionBiodiversity - correct answer ✔✔broad concept of encompassing total diversity which includes genetic
diversity, species diversity and habitat diversity.
Genetic diversity - correct answer ✔✔Range of genetic material present in the population of a species
Species Diversity - correct answer ✔✔number of organisms within each different species
Habitat diversity - correct answer ✔✔range of different habitats within a biome
Habitat Diversity Advantages - correct answer ✔✔higher rate of resilience,
higher genetic diversity,
more nutrients in the soil for other plants to use
Habitat Diversity Disadvantages - correct answer ✔✔- Can be the result of fragmentation
- Some don't have a lot of plants
How do we measure biodiversity? - correct answer ✔✔- Measuring pollution, eutrophication,
colonization, patterns in biodiversity
- Quadrat sampling
- Simpson's Diversity Index
Hotspots - correct answer ✔✔region with a high level of biodiversity that is under threat from Human
Activities.
Endemic Species - correct answer ✔✔species that are only found in one geographic location
Aspects of a hotspot - correct answer ✔✔- 70% of the habitat has been lost already
, - Over 1,500 species of plants that are endemic
- Tend of large densities of human habitation nearby
- Cover 2.3% of the land surface
Examples of Hotspots - correct answer ✔✔Caribbean Islands, Cerrado
Evolution - correct answer ✔✔gradual change in the genetic characteristics of populations over many
generations achieved largely through the mechanism of natural selection
Genotype - correct answer ✔✔genetic makeup of an organism
Phenotype - correct answer ✔✔physical characteristics of an organism
Natural Selection - correct answer ✔✔those who are more adapted to the environment through genetic
variation have an advantage and flourish and reproduce.
Survival of the Fittest - correct answer ✔✔Those who are fit to suit an environment, survive and
reproduce
Adaptation - correct answer ✔✔Change in genetic structure or behavior in order for a species to survive
in their environment
Speciation - correct answer ✔✔formation of a new species
physical barriers - correct answer ✔✔physical separation of a species not allowing them to reproduce.
This can include mountains or a river.
Causes isolation -> speciation
Land bridges - correct answer ✔✔Lowered sea levels cause 2 geographic locations to conjoin.
- New species from the two recently conjoined areas can invade the new area. Some species may be able
to interbreed with the newfound species,
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BravelRadon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now