Summary
Summary Variation in population size A level Biology
- Institution
- AQA
Year 1 Biology AQA A level notes. Achieved an A* in my final exam using these notes. They are based on the mark scheme requirements.
[Show more]
Seller
Follow
Content preview
Variation in population sizesummary notes
27 June 2023 12:46
Plotting growth curves
- Can plot a graph of numbers in a population
against time where a population grows in size
slowly over a period of time
- If the population grows rapidly over a short
period of time must use logarithmic scale to
represent the number of a population
Carrying capacity- certain size of population that can be
sustained over a long period of time- determined by
limiting factors
Abiotic factors influencing size of a population
Temperature
- Each species has a different optimum
temperature at which it is best able to survive
- Further away from the optimum, the fewer the
individuals in a population are able to survive
- Plants and cold blooded animals- temperatures
fall below the optimum- enzymes work more
slowly- metabolic rate is reduced - populations
have a smaller carrying capacity
- Temperatures above optimum- the enzymes
work less efficiently because they undergo
denaturation- carrying capacity is reduced
- Warm blooded animals can maintain constant
body temperature regardless of external
temperature - further the temperature of the
external environment from optimum, more
energy organisms expend trying to maintain
normal temperature - less energy for individual
growth- mature more slowly- reproductive rate
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 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 arabellasherratt. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
52928 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now