Phloem: The Pressure Flow Hypothesis of Food Movement


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Insects often eat leaves and other plant structures in order to obtain nutrients such as sugar. Which location in a plant will most likely provide sugars for the insect because it is a part of the phloem?

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1. The pressure flow hypothesis can be used to explain:

2. Which structure associated with phloem carries out metabolic activities for the phloem?

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About this Quiz & Worksheet

Test your ability to understand vascular plants and how nutrients move through the tissue. Quiz questions assess your knowledge of the pressure flow hypothesis and sugar sinks.

Quiz & Worksheet Goals

In these assessments you'll be tested on the following:

  • Location in plant that has sugars
  • Pressure flow hypothesis
  • Structure associated with phloem that carries out metabolic activities
  • Sugar sink
  • Sugar source

Skills Practiced

This worksheet and quiz let you practice the following skills:

  • Reading comprehension - ensure that you draw the most important information from the related vascular plants lesson
  • Defining key concepts - ensure that you can accurately define main phrases, such as sugar sink and phloem
  • Critical thinking - apply relevant concepts to examine information about pressure flow hypothesis in a different light

Additional Learning

To review concepts related to vascular tissue, read through the brief lesson called Phloem: The Pressure Flow Hypothesis of Food Movement. This lesson will help you:

  • Identify what vascular tissue is and how the phloem and xylem pass nutrients through a plant
  • Learn about different parts of the plant such as sieve plates, sieve cells and sieve tubes
  • Review what sinks and sources are and how they relate to sugar production and storage
  • Recall what the pressure flow hypothesis is and how nutrients move through vascular tissue