and e Question C Status: QUESTION 16 1 points Save Anawer occurs in one tracheid
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and e Question C Status: QUESTION 16 1 points Save Anawer occurs in one tracheid, it will expand to fill the whole tracheid but is unlikely to expand to other If an tracheids because Tracheids have a sealing mechanism that deposits proteins and carbohydrate across the pits Tracheids are surrounded by a layer of suberin that prevents gas from moving through the pits The force required to overcome the surface tension in the pits it to great Ficks law states that gas diffusion through small pores is too slow to affect plant growth The plant will quickly grow a new tracheid to the water can pass around the embolism 1 points Save Answer QUESTION 17 Water use in leaves creates tension (a driving force) in the cell walls. What is the predominant fate of water in leaves O It is used in photosynthesis O It is used to drive cell expansion and growth It escapes through the cuticle layer covering the leaf epidermis It escapes through open stomata Water is pulled up by gravity and resistance to bulk flow in xylem 1 points Save Anseer QUESTION 18Explanation / Answer
16) they have a sealing mechanism that deposited proteins and carbohydrates across the pits.
Pits have deposits of hemicellulose and pectin - ,microfilaments - which make fine pores in the pit membrane making it permeable only to water and nit embolic cavities ir pathogens.
17) it is used in photosynthesis.
The O2 utilized during photosynthesis, comes from hydrolysis of H2O molecule by light (not from aymospheric O2 as is the general assumption)
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