Plant structures and tissues Knowledge-Based Practice

Questions

1. 1.

   Which lateral meristem is responsible for secondary growth by producing secondary xylem toward the inside and secondary phloem toward the outside of a plant stem or root?

   • A) Cork cambium
   • B) Apical meristem
   • C) Vascular cambium
   • D) Intercalary meristem
2. 2.

   Which ground tissue consists of elongated cells with unevenly thickened primary cell walls that remain alive at functional maturity to provide flexible support to developing plant organs?

   • A) Parenchyma
   • B) Collenchyma
   • C) Sclerenchyma
   • D) Periderm
3. 3.

   Which specialized layer of root tissue features a suberin-rich band known as the Casparian strip that blocks apoplastic diffusion and regulates solute entry into the vascular cylinder?

   • A) Epidermis
   • B) Pericycle
   • C) Cortex
   • D) Endodermis
4. 4.

   Which specialized plant cell type conducts sugars and organic nutrients while remaining alive at functional maturity despite lacking a nucleus and ribosomes, depending directly on companion cells for metabolic maintenance?

   • A) Tracheid
   • B) Sieve-tube element
   • C) Vessel element
   • D) Sclereid
5. 5.

   Which plant tissue is composed of cells with thick, heavily lignified secondary cell walls that are typically dead at functional maturity and provide rigid mechanical support to mature plant structures?

   • A) Parenchyma
   • B) Collenchyma
   • C) Sieve-tube elements
   • D) Sclerenchyma

Answers and step-by-step solutions appear after you finish the test.