Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Monocotyledonous roots are characterized by a pith that is:
In monocotyledonous roots, the pith is large and well developed, as stated in the NCERT text: 'Pith is large and well developed.'
The vascular bundles in monocot roots are described as:
The context states: 'When xylem and phloem within a vascular bundle are arranged in an alternate manner along the different radii, the arrangement is called radial such as in roots.' And specifically for monocot roots: 'As compared to the dicot root which have fewer xylem bundles, there are usually more than six (polyarch) xylem bundles in the monocot root.'
Arrange the following layers of a monocotyledonous root from the periphery to the center:
Based on Figure 6.3 (b) and the general description of root anatomy, the layers from periphery to center are Epidermis, Cortex, Endodermis, Pericycle, Phloem, Xylem (vascular bundles), and Pith.
Which of the following statements is TRUE regarding the secondary growth in monocotyledonous roots?
The NCERT text clearly states: 'Monocotyledonous roots do not undergo any secondary growth.'
What is the primary difference in vascular tissue organization between monocot and dicot roots?
The text states: 'As compared to the dicot root which have fewer xylem bundles, there are usually more than six (polyarch) xylem bundles in the monocot root.' Both dicot and monocot roots have radial vascular bundles.
In monocotyledonous roots, the vascular bundles are characterized by:
The text states for roots: 'When xylem and phloem within a vascular bundle are arranged in an alternate manner along the different radii, the arrangement is called radial such as in roots.' This applies to both monocot and dicot roots. Monocot roots specifically lack cambium and do not have conjoint bundles.
The innermost layer of the cortex in a monocot root, similar to a dicot root, is called the:
The internal tissue organisation of roots includes: 'The innermost layer of the cortex is called endodermis.' This feature is shared between monocot and dicot roots.
What is the nature of the casparian strips found in the endodermis of a monocot root?
The endodermis 'comprises a single layer of barrel-shaped cells without any intercellular spaces. The tangential as well as radial walls of the endodermal cells have a deposition of water -impermeable, waxy material suberin in the form of casparian strips.' This applies to both dicot and monocot roots, as monocot root anatomy is 'similar to the dicot root in many respects.'
In monocotyledonous roots, lateral roots originate from which tissue?
The text states for dicot roots that 'Initiation of lateral roots and vascular cambium during the secondary growth takes place in these cells' (referring to pericycle). As monocot roots share many anatomical similarities, lateral roots also originate from the pericycle.
Which of the following statements about resonance is INCORRECT?
According to the NCERT text, 'The molecule does not exist for a certain fraction of time in one canonical form and for other fractions of time in other canonical forms.' Instead, the resonance hybrid is a single, unchanging structure that cannot be accurately represented by any single canonical form.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.