Multiple choice

Which one of the following statements is not correct ?

  1. Roots produce gibberellins

  2. The Casparian strips in roots are involved in controlling the types of minerals that enter the xylem water stream

  3. Lateral roots are initiated by cell division in the endodermis

  4. When Rhizobium converts N2 into nitrogenous compounds that are released into the host cells, energy is supplied by sugars from the legume root cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The question asks which statement is NOT correct. Lateral roots originate from the pericycle (a layer of cells inside the endodermis), not from the endodermis itself. The other statements are all accurate: roots do produce gibberellins, Casparian strips regulate mineral entry into the xylem, and Rhizobium's nitrogen fixation is powered by host-derived sugars.

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