VPart E Some plant species are used for phytoremediation because when grown in s

Question

VPart E Some plant species are used for phytoremediation because when grown in soil contaminated by heavy metals and other pollutants, they accumulate the contaminants in their tissues. In this way, they can be used to clean up the soil. Such plants are called "hyper-accumulators." Other plants, however, cannot take up the contaminants from the soil and are called "non-accumulators." If you were to analyze root cross sections from each of these types of plants after they were grown in contaminated soil, what differences would you likely find? Hyper-accumulators would have contaminants in the cortex but not the vascular cylinder, and non-accumulators would have contaminants in the vascular cylinder but not the cortex. Hyper-accumulators would have contaminants in the cortex and vascular cylinder, and non-accumulators would have contaminants in the cortex but not the vascular cylinder. Hyper accumulators would have contaminants in he vascular cy inder but no cortex but not the vascular cylinder. he corte and non ac mu a o s v avec ninan s ne Hyper-accumulators would have contaminants in the vascular cylinder but not the cortex, and non-accumulators would have contaminants in the cortex and the vascular cylinder Request Answer

Explanation / Answer

Answer: Hyper-accumulators would have contaminant in cortex and vascular cylinder, and non-accumulant would have contaminant in cortex but not in vascular cylinder.

Explanation: Hyperaccumulators are the type of plants which concentrate heavy metals in there aerial part ( generally in leaves) and have ability to grow on metalliferous soils. while non accumulators are generally normal plants.

so as we know that translocationof any substance either minerals or any heavy metal in plants is possible only through root system followed by vascular bundles as it contains xylem and phloem part for conduction of water ,minerals as well as food.

the structure of root consists of outer epidermis then cortical region and after this is found vescular bundles.so hyperaccumulator must follow the path from cortex then to vescular bundle so that they will reach to aerial part.

In this way according to the option provided option two is correct. as nonaccumulators will remain in cortical region but not the vascular cylender.

Related Questions

Navigate

• Browse (All)
• Browse V
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.