IB Transport in phloem

State the term for the process of transporting carbohydrates in the phloem.

Sugars are principally transported in what form?

• Glucose

• Fructose

• Sucrose

• Starch

State the term for the location where compounds are delivered to for use or storage.

Identify the source

• Potato tuber

• Fruit

• Leaf

• Seed

Identify the process used to load organic compounds into phloem sieve tubes at the source.

• Endocytosis

• Facilitated diffusion

• Osmosis

• Active transport

The active transport of solutes (such as sucrose) into the phloem by companion cells makes the sap solution which of the following?

• Isotonic

• Hypotonic

• Hypertonic

• Dilute

What is the term for the protruding mouthpiece possessed by aphids which pierce the plant’s sieve tube to allow sap to be extracted?

Tags

NGSS.MS-LS4-2

State the pressure that forces the phloem sap to move towards areas of lower pressure (mass flow)

An increase in solute concentration in a phloem sieve tube causes water to be drawn in by what process?

• Osmosis

• Endocytosis

• Facilitated diffusion

• Simple diffusion

Which of the following describes tubers?

• Modified roots that store water or food in an enlarged central stele

• Horizontal underground stems that store carbohydrates

• Modified leaf bases (found as underground vertical shoots) that contain layers called scales

• Fruits that store sugars