IB Biology Topic 4: Ecology Final Exam Questions & Answers.
8 views 0 purchase
Course
Ib biology
Institution
Ib Biology
IB Biology Topic 4: Ecology Final Exam Questions & Answers.
Ecology - CORRECT ANSWER The science of the relationships between organisms and their environments.
Organism - CORRECT ANSWER an individual living thing that uses energy, reproduces, responds, grows, and develops
Species - CORRE...
the energy in the carbon compounds (food) is released through respiration. much of this energy is lost
as heat.
Food web - CORRECT ANSWER network of complex interactions formed by the feeding relationships
among the various organisms in an ecosystem
Pyramid of energy - CORRECT ANSWER - diagram that shows the relative amounts of energy or matter
within each trophic level in a food chain or food web
- should be stepped
- the length of the bar represents the amount of energy transferred to the trophic level (resulting in an
increase in biomass)
- the unit = KJ m^-2 yr^-1
- around 10% of energy at any trophic level is passed on to the next trophic level
- the number of trophic levels is limited, as there is ever decreasing quantities of energy available for
transfer and the energy is passed along the food chain.
- reasons for loss of energy between the trophic levels include:
* energy is lost as heat due to respiration
* not all of the individuals at each trophic level is consumed
* not all parts of the organism can be digested.
10% Rule - CORRECT ANSWER Only 10% of the energy in one trophic level gets passed onto the next
trophic level
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 Nursewendo. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.