Monday 13 May 2024 – Morning
AS Level Biology A
H020/01 Breadth in biology
Time allowed: 1 hour 30 minutes
You can use:
• a scientific or graphical calculator
• a ruler (cm/mm)
Please write clearly in black ink. Do not write Candidate
Centre number in the barcodes.
number
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• First
Write your answer to each question in the space provided. If you need extra space use the lined
name(s)
pages at the end of this booklet. The question numbers must be clearly shown.
• Last
Answer
nameall the questions.
• Where appropriate, your answer should be supported with working. Marks might begiven
for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• This document has 28 pages.
ADVICE
• Read each question carefully before you start your answer.
,
, 2
Section A
You should spend a maximum of 25 minutes on this section.
Write your answer for each question in the box provided.
1 Which process occurs during ventilation in bony fish?
A During expiration, the operculum opens
B During expiration, the volume in the buccal cavity increases and the pressure decreases
C During inspiration, the mouth opens causing the operculum to open
D During inspiration, the volume in the buccal cavity decreases and the pressure decreases
Your answer [1]
2 Which change in the mammalian gas exchange system takes place only during forced
expiration?
A Abdominal muscles relax
B Diaphragm contracts to become dome-shaped
C External intercostal muscles contract
D Internal intercostal muscles contract
Your answer [1]
3 The blue whale can grow up to 30 m long and can weigh up to 200 000 kg.
Whales have specialised surfaces for gas exchange.
Which option is not a reason why blue whales need a specialised surface for gas exchange?
A Transport of gases by diffusion is too slow
B Whales are multicellular organisms
C Whales have a high metabolic demand
D Whales have a large surface area to volume ratio
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 DistinctionGuruHuan1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.89. You're not tied to anything after your purchase.
