Find the correct statements regarding the structure of xylem and phloem:
I. Xylem parenchyma store starch or fat or Tannins
II. Xylem parenchyma have highly thickened walls and obliterated central lumens
III. Companion cells are controlled by nucleus of sieve tubes
IV. Phloem parenchyma is absent in most of the monocots
Match the plant growth hormones of Column-I with suitable chemical derivatives present Column-II and choose the correct option given below:
The table below lists potential environmental conditions in future climates, related to atmospheric carbon dioxide concentrations (CO2) and mean annual temperature (MAT). The table also lists potential outcomes with respect to whether conditions will favour grasses with C3 or C4 photosynthetic pathways. Assuming no other changes in environmental conditions, match the options in the two columns.