Lecture 9 Practice

Select all true statements about xylem.

• It is the plant tissue used to make bast fibers.

• Xylem cells only have primary cell walls.

• Xylem cells have thick secondary cell walls.

• Xylem moves photosynthate (sugars) throughout the plant body.

• Xylem moves water throughout the plant body.

____ fibers are made from clusters of phloem fibers in the inner bark of eudicot stems.

Paper was first made from the fibers of the ______ plant.

________ is the fiber extraction technique of tearing surface fibers loose.

________ is the fiber extraction technique of isolating soft fibers from stems by rotting the plant tissue using microbes or chemicals.

Select all true statements about retting.

• Most retting is done using heavy nighttime dew and warm daytime temperatures.

• Water retting can be done in natural bodies of water or in tanks.

• Tank retting is usually a slower process than natural water retting.

• Water retting is the most commonly used form of retting.

Select all true statements about cotton.

• Most economically important non-food plant

• It grows best in cool weather and low water.

• Only one species of cotton is used to produce fibers.

• Cotton grows well in parts of California if it is irrigated.

• The labor of enslaved people once made the cotton industry the backbone of the US economy.

Tags

NGSS.MS-LS1-5

____ is a bast fiber that provides a significant portion of the export income of Bangladesh.

Tags

NGSS.HS-ESS3-1

Select all true statements about hemp.

• Provides bast fibers that are 3 -10 feet long.

• Fibers have been used for sails, tents, covered wagons, backpacks, and painting canvas.

• Provided the original fabric for Levi blue jeans.

• Citizens of the US were encouraged to grow hemp to help with the war effort during WWII.

Select all true statements about plant fibers.

• Fibers from Agave leaves can be used to make sisal.

• Fibers from the leaves of plants in the banana family are used in the Philippines to make things like clothing, marine rope, and envelopes.

• The exocarp of coconuts is used to produce coconut coir.

• Linen fibers have been used by humans for at least 10,000 years.