Home
Class 11
BIOLOGY
Study carefully the follwing statemnets ...

Study carefully the follwing statemnets and select in incorrect one (s).
(i) Lateral roots develop from pericycle
(ii) Endodermis is the innermostk layer of cortex
(iii) Sap wood is the central, dark coloured, non-conducting part of secondary xylem.
(iv) Hypodermis is always parenchy-matous in nature.

A

(i) and (ii)

B

(ii) and (iv)

C

(i) only

D

(iii) only

Text Solution

AI Generated Solution

The correct Answer is:
To determine the incorrect statement among the provided options, let's analyze each statement step by step. ### Step-by-Step Solution: 1. **Statement (i): Lateral roots develop from pericycle.** - This statement is **correct**. Lateral roots indeed originate from the pericycle, which is a layer of cells located just inside the endodermis in the root. 2. **Statement (ii): Endodermis is the innermost layer of cortex.** - This statement is also **correct**. The endodermis is the innermost layer of the cortex in roots, acting as a selective barrier for the movement of water and nutrients. 3. **Statement (iii): Sap wood is the central, dark coloured, non-conducting part of secondary xylem.** - This statement is **incorrect**. Sapwood is actually the lighter-colored, outer part of the secondary xylem that is involved in the conduction of water and nutrients. The central, dark-colored part is known as heartwood, which is non-conducting. 4. **Statement (iv): Hypodermis is always parenchymatous in nature.** - This statement is **incorrect**. The hypodermis can be made up of different types of cells, including collenchyma and sclerenchyma, depending on the plant type. It is not always parenchymatous. ### Conclusion: The incorrect statements are (iii) and (iv). However, if the question asks for a single incorrect statement, (iii) is the most commonly recognized incorrect statement regarding sapwood. ### Final Answer: The incorrect statement is (iii): "Sap wood is the central, dark coloured, non-conducting part of secondary xylem." ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Study carefully the following statements and select the incorrect one(s). (i). Lateralroots develop from pericycle. (ii) . Endodermis is the innermost layer of cortex (iii). Sapwood is the central, dark coloured, non-conducting part of secondary xylem.

Consider the following statements and select the incorrect ones. I. Honeybee has developed arrhenotoky in which the male develop from the fertilised egg and the female from unfertilised egg. II. In the thelytoky, the haploid unfertilised egg parthenogenetically develop into females. III. Heterogamy is the alteration between parthenogenesis and asexual reproduction. IV. Parthenogenesis occurs naturally during reproducing in ants and aphids. Choose the correct codes.

Read the following statements carefully and select the incorrect ones. (i) Development of the fertile top-soil takes centuries, but it can be easily removed due to human activites such as over-cultivation, unrestricted grazing, etc. (ii) Waterlogging results in soil salinity. (iii) UV rays are responsible for degradation of ozone shield in atmosphere. (iv) Ozone present in troposphere acts as a shield abosrbing UV radiations coming from the Sun. (v) Global warming can be controlled by increasing the use of fossil fuels.

Identify the correct pair of statement (i) pericyle parenchymatous in dicot root but sclerenchymatous in mature monocot root (ii) pericycle of both dicot and monocot root produces lateral roots during secondary growth (iii) All cells of dicot root endodermis are passage cells (iv) Xylem is produced in centripetal manner in roots of fruit bearing plants

Identify the correct pair of statements. I. Pericycle is parenchymatous in dicot root but sclerenchymatous in mature monocot root. II. Pericycle of booth dicot and monocot roots produces lateral roots during secondary growth. III. All cells in endodermis of dicot root are passage cells. IV. Xylem is produced in centripetal manner in roots of fruit bearing plants.

Which of the following statements is/are not incorrect? (i) Water and minerals, and food are generally moved by a mass or bulk flow system. (ii) Bulk flow can be achieved either through a positive hydrostatic pressure gradient or a negative hydrostatic pressure gradient. (iii) The bulk movement of substances through the conducting tissues of plants is called translocation. (iv) Xylem translocates organic and inorganic solutes, mainly from roots to the aerial parts of the plants. (v) Phloem translocates water, mineral salts, some organic nitrogen and hormones, from the leaves to other parts of the plants.