Exam (elaborations)
AQA A Level Biology - Populations in ecosystems Workbook (2021-22)
- Institution
- AQA
A useful workbook of past paper questions on Populations in Ecosystems, preparing students for upcoming exams.
[Show more]
Seller
Follow
Content preview
Cardinal Newman CollegeName:
Populations PPQs
Q1. Ecologists studied a community of fish in a lake.
(a) Explain what is meant by a community.
........................................................................................................................
........................................................................................................................
........................................................................................................................
(1)
(b) (i) The ecologists could have used the mark-release-recapture method to estimate the
number of one species of fish in the lake. Describe how.
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
(3)
(ii) This species of fish breeds at a certain time of the year. During this fish-breeding season, the
mark-release-recapture technique might not give a reliable estimate.
Suggest one reason why.
...............................................................................................................
...............................................................................................................
...............................................................................................................
(1)
(c) The ecologists found that each species of fish had adaptations to its niche. One of these
adaptations was the shape of its mouth.
Suggest how the shape of mouth is an adaptation to its niche.
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
Page 1
, Cardinal Newman College
Q2. (a) Blue tits are small birds that live in woods. An ecologist estimated the size of the blue tit
population visiting gardens near a wood in November.
• She trapped 28 blue tits. She marked all of these birds with small metal rings on their
legs.
• Two weeks later, she trapped another sample of blue tits. Of these birds, 18 were
marked and 20 were not marked.
Use the data to estimate the size of the blue tit population. Show your working.
Size of population ....................................
(2)
(b) The diagram shows some features of blue tit behaviour at different times of the year.
Page 2
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 kmomoniat. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £9.50. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
50064 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