Target: 10 questions in 10 minutes

Q1+2. The image shows a transverse section of blood vessels seen under a light microscope.

labelled image of blood vessels

 OpenStax College (adapted)
CC-BY-SA 3.0
1. Which structure(s) in the above diagram contain elastic fibres and collagen?
  • A.  II only
  • B.  III only
  • C.  II and III only
  • D. I and II only
2. Which features seen on the image can be used to distinguish arteries and veins?
  • A.  II only
  • B.  I and II only
  • C.  I and III only
  • D. I, II and III

Q3&4. The image below shows a human heart.

labelled image of heart showing cross-sectional view
3. Which letter shows the location of the sinoatrial node?
  • A. I
  • B. II
  • C. III
  • D. IV
4. After a red blood cell enters the heart via the pulmonary veins, which sequence shows the path it should take during a complete circuit of the body?
  • A. II → IV → III → I
  • B. III → I → II → IV
  • C. I → II → IV → III
  • D. IV → III → I → II

Q5&6. The image shows changes in pressure in the left ventricle and aorta during the cardiac cycle.

Aortic and ventricular pressure - graph

 MikeRun (adapted)
CC-BY-SA 4.0
5. At which point during the cycle would the semilunar valve close?
6. At which point during the cycle would there be atrial filling?

7. The image below shows a longitudinal section of a plant stem seen under a light microscope.

plant stem cross section - flicr - public domain

The structure labelled X should have which adaptations and function?

  Adaptation Function
A Sieve elements Transpiration
B Lignin Translocation
C Reduced cytoplasm and organelles Translocation 
D Annular rings  Transpiration 
8. Which adaptation of xylem vessels specifically helps them withstand the tension generated during transpiration?
  • A. Presence of sieve plates
  • B. Lignified walls
  • C. Reduced cytoplasm and organelles
  • D. Thin walls with fenestrations
9. Under which condition might plants use active transport of mineral ions to generate positive pressure potential within xylem vessels of a root?
  • A. When leaves of deciduous trees are in fully open
  • B. When there is a high level of humidity
  • C. When there is high light intensity
  • D. When is it windy

Q10. The image shows a transverse section of the root of a dicotyledonous plant seen under a light microscope.

Mesophyte_leaf_Syringia cross-section

 Naz Amann
CC-BY-SA 4.0
The plant is placed in water containing blue ink. In which region of the root would you expect the blue colour to appear due to the action of transpiration?