Tracer & Ringing Experiments (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
Which plant tissue transports sugars and amino acids?
Which plant tissue transports sugars and amino acids?
Phloem
In a woody stem, what is the order of layers from outside to inside?
In a woody stem, what is the order of layers from outside to inside?
Bark, phloem, xylem
In a ringing experiment, which tissues are removed from the stem?
In a ringing experiment, which tissues are removed from the stem?
Outer bark and phloem
What happens to the region above the ring in a ringing experiment?
What happens to the region above the ring in a ringing experiment?
It swells with high sugar levels
What happens to non-photosynthetic tissues below the ring?
What happens to non-photosynthetic tissues below the ring?
They wither and die
Why do ringing experiments prove phloem transports sugars?
Why do ringing experiments prove phloem transports sugars?
Ring removed phloem but left xylem intact
Which radioactive isotope is used in tracer experiments to study sugar transport?
Which radioactive isotope is used in tracer experiments to study sugar transport?
Carbon-14 (C)
What does autoradiography reveal in tracer experiments?
What does autoradiography reveal in tracer experiments?
Location of radioactive sugars in tissue
In autoradiography, where does the X-ray film blacken?
In autoradiography, where does the X-ray film blacken?
Only where phloem tissue is present
What do aphids insert their mouthparts into when feeding?
What do aphids insert their mouthparts into when feeding?
Sieve tubes