IGCSE Transpiration and Translocation

What is the most abudant solute in phloem sap?

• amino acids

• hormones

• sugar

• minerals

Which of the following statement is true about sieve tube cells?

• Sieve tube cells are nucleated but devoid of mitochondria and ER

• Companion cells are non-nucleated and regulated by nucleated sieve cell

• Sieve tube cells are present in all plants

• Companion cells are nucleated and regulates activity of non-nucleated sieve tube

What is the best words to describe sugar source and sugar sink

• Both are plants organ and act as storage

• Sugar sink can be either roots, fruit or mature leaves and sugar source is shoots

• Sugar source act as site for sugar production and sugar sink will store sugar

• Companion tube carry food from a sugar source to a sugar sink

Process in which food substances are moved to the rest of plant by phloem is known as

• transpiration

• respiration

• photosynthesis

• translocation

Movement of sugar from source to other parts of plant is assist by

• active transport

• diffusion

• endosmosis

• capillary action

All events below occurs in sink tissue, except

• Water potential increases

• Water enters sieve elements from xylem

• Higher(+ve) solute potential

• Phloem turgor pressure decrease

What is the form of sugar being move to companion cells?

• glucose

• maltose

• sucrose

• starch

Transpiration is a part of____________?

• Condensation

• Sublimation

• Evaporation

• Precipitation

Tags

NGSS.MS-ESS2-4

What is absorbed by the plant by it's roots, and transpiration takes place as the water exits the ________?

• Leaves

• Stem

• Branch

• Roots

Tags

NGSS.MS-LS1-5

What is the effect of increasing light intensity in transpiration?

• It decreases transpiration rates

• It increases transpiration rates

• It doesn't impact the rate of transpiration

Tags

NGSS.MS-LS2-1