32. \"Imperfeer\" flowers can be found a. never on individual plants in monoecio
ID: 210125 • Letter: 3
Question
32. "Imperfeer" flowers can be found a. never on individual plants in monoecious species. b. only on individual plants in monoecious species. e. on individual plants in both monoecious and dioecious plant species d. only on individual plants in dioecious species. 33. Tracheids and vessel elements are able to move water effectively throughout a vascular plant due to: cytoplasm. a. the very fine control that these cells have over the concentration of solutes in their b. the presence of pits and perforations in the lignified secondary cell wall lining these cells. c. active movement of water through the plasmodesmata that are maintained between adjacent cells of this type. d. large amounts of water that enter at the stomata and move to the vascular tissue. 34. In the a cell act to uxin-mediated elongation response seen in plant cells, protons pumped to the outside of the a. open more plasmodesmata, which allows more water to flow into the cell. b. force more water to move through the symplastic route rather than the apoplastic route. c. loosen connections among cell wall components, thus lowering the pressure potential of the cell. d. increase the phi of the cell wall, thus decreasing the solute potential outside the cell.Explanation / Answer
Answer to question 32
IMPERFECT FLOWERS are those flowers which contain only one of the sexual reproductive part that is either male or female (carpel or stamen) called staminate and carpellete respectively . these both type of species are present on the same plant in the species like CORN , CUCUMBER, OR SQUASH. and these plants are called MONOCEIOUS PLANTS.
so the correct answer is option b. which says -imperfect flowers are found only on individual plants in monoceious plants.
Answer to question 33.
the correct answer for this question is option b -the presence of pits and perforations in the vignified secondary cell wall lining of these cells.
reason for the same is ,xylem has two types of components vessels and tracheids , when individual vessel elements stacked end to end form an open tube like structure called xylem conduits. and the secondary cell wall of these vessels and tracheids have bordered pits as cavities , when water reaches at end of these conduits or in lateral conduits , water must cros sthrough these pits in the conduit cell wall.
these pits are essential in water transport in plants.
Answer to question 34. is option -c,loosens connections among cell wall components thus and lowering the pressure potential of the cell.
Auxin mediates h+ -ATPase activation , causes proton pump , which resuls in apoptotic acidification ,
when these protons [H+] enter into the cell water >.it causes lowering of pH of the cell>, which further causes loosening of cell wall >, and ultimately elongation of scutellum .
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