IB Biology 9.2

Which of the following are transported in phloem - and by what process?

• Sucrose, amino acids, minerals - actively by translocation
• Sucrose, carbonic acids, hormones - actively by transpiration
• Sucrose, amino acids, hormones - actively by translocation
• Sucrose, amino acids, hormones - passively by translocation

Which part of the aphid will reach into which structure in the plant?

• tail piece; phloem
• stylet; xylem
• tail piect; pith
• stylet; phloem

What is the main explanation for the fact that water can cause hydrostatic pressure?

• Because it is incompressible.
• Because it is polar.
• Because it attracts other water molecules.
• Because it exhibits electronegativity.

Which cells are alive but lack organelles?

• Xylem cells
• Tracheid cells
• Companion cells
• Sieve tube cells

What is the name for the structures that allow flow of material between phloem cells?

• Cellulose
• Sieve plate
• Sieve cell
• Trachieds

Why must radioactive CO2 be used when tracing phloem flow?

• It is incorporated into the phloem cells
• It is incorporated into the minerals in the phloem
• It is incorporated into the sucrose during cellular respiration
• It is incorporated into the sucrose during photosynthesis

Tags

NGSS.MS-LS1-6

Which best describes the flow of phloem?

• Root to shoot; one direction
• Source to sink; two directions
• Source to sink; one direction
• Root to shoot; two directions

Where is phloem tissue found in a stem?

• On the side facing the epidermis in the vascular bundle.
• One the side facing the pith in the vascular bundle.
• Distributed with some facing the epidermis and some facing the pith.
• Only in the middle of the vascular bundle.

All of the following EXCEPT ______ are produced by plants and carried in phloem.

• Auxins
• amino acids
• minerals
• hormones

All of the following are involved in translocation EXCEPT:

• Living tissue
• Thick cellulose
• companion cells
• Diffusion