In exarch condition of xylem, protoxylem or the first formed xylem is present towards the periphery while metaxylem or later formed xylem is present towards the centre of the root. Such an arrangement can be seen in roots.

What is it called when the Protoxylem lies toward the periphery?

-In exarch condition, the protoxylem (the first-formed xylem) lies towards the periphery and the metaxylem (the later-formed xylem) lies towards the center (pith). Hence, the youngest lies closest to the center in this type of arrangement. So, the answer is, “Exarch.”

When Protoxylem is formed towards Centre and Metaxylem towards the periphery then this condition is called?

When protoxylem is at the center and metaxylem is at periphery it is called endarch condition present in the stem.

When the Protoxylem is situated on outside of Metaxylem such a condition is called as?

In exarch condition protoxylem lies outside if metaxylem in linear form and endarch condition the protoxylem lies inside of metaxylem in linear form whereas in mesarch condition metaxylem are present in circular form and inside the metaxylem protoxylem are present in middle.

Which of the following conditions of xylem is present in both monocot and dicot stem?

Based on position of protoxylem in relation to metaxylem, the xylem may be exarch/centripetal, endarch/centrifugal, mesarch and centerarch. In endarch condition, protoxylem lies on the inner side of metaxylem e.g., dicot and monocot stems.

In (i), protoxylem lies towards periphery and metaxylem lies towards centre. Such an

25 related questions found

Which of the following condition of xylem is present in both monocot and dicot stems a Exarch B Endarch C Polyarch D Mesarch?

Note: Even though xylem in both monocot and dicot root lies in exarch pattern, in monocots, xylem is present in polyarch(more than six in number) condition but the number of xylem bundles ranges from two to six in dicots, which means in dicot xylem is in diarch to hexarch condition.

Which of the following condition of xylem is present in?

Complete Step by Step Answer: Xylem is the chief water- conducting tissue of the plants. The Exarch condition of xylem is present in which the metaxylem lies towards the centre and the protoxylem towards the periphery.

When xylem and phloem are arranged in an alternate manner on different radii?

When xylem and phloem within a vascular bundle are arranged in an alternate manner on different radii, the arrangement is called radial such as in roots. In conjoint type of vascular bundles, the xylem and phloem are situated at the same radius of vascular bundles. Such vascular bundles are common in stems and leaves.

What is Exarch xylem?

Exarch xylem is the arrangement in which the protoxylem (the first formed primary xylem cells in a plant shoot/root) is directed towards the periphery and metaxylem (later formed primary xylem cells in a plant shoot/root) is directed towards the centre.

What is Endarch?

: formed or taking place from inner cells outward endarch xylem.

When primary xylem faces inward is called?

Endarch condition involves the development of protoxylem from the innermost procambial cells adjacent to pith. Development is inward to outward. Hence, protoxylem is found inside to metaxylem .

Which is correct for Dicot root?

The correct statement is the Vascular bundles are open in dicot root. ... In dicot root xylem is arranged in the center and phloem is outside the xylem.

What is the function of phloem parenchyma?

The function of phloem parenchyma is to store food material and other substances like resins, latex and mucilage. It also helps in translocation of food. They also helps in slow lateral conduction of food.

What is it called when Protoxylem lies towards outside and Metaxylem lies towards the inside?

In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. This type of primary xylem is called endarch. In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called exarch.

What is dicot root?

Dicot roots have a taproot structure, meaning they form a single thick root, with lateral branches, that grows deep into the soil. The ground tissue of dicot roots, primarily composed of parenchyma cells, surrounds the roots' central vascular structures.

Which of the following is absent in monocot stem but present in dicot stem?

Phloem parenchyma is found in both primary and secondary phloem. It is a part of the phloem elements. These are found in dicot roots, leaves, and stems but are absent in monocot plants.

Does root have exarch Protoxylem?

In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called exarch. ... The vascular system consists of complex tissues, the phloem and the xylem. The xylem and phloem together constitute vascular bundles.

What is Protoxylem and Metaxylem?

Protoxylem is the first formed primary xylem that matures before the plant organs complete their elongation while metaxylem is the later formed primary xylem that matures after the completion of the growth of the plant organs. Moreover, protoxylem has smaller cells. Whereas, metaxylem contains larger cells.

What is Protoxylem lacuna?

Protoxylem lacuna: A space surrounded by parenchyma cells in the protoxylem of a vascular bundle. Appears in some plants after the protoxylem has ceased to function, after these elements have been stretched and torn, thus forming the cavity.

When xylem and phloem are arranged in an alternate radii constitute a vascular bundle called?

Xylem and phloem are arranged in alternate radii constitute a vascular bundle called Conjoint bundles. Q II. 2.

When xylem and phloem are situated in two different radii the type of vascular bundle is?

When xylem and phloem within a within a vascular bundle are arranged in an alternate manner on different radii the arrangemetn is called radial such as in roots.

When xylem and phloem are jointly situated on same radius is called?

2)Conjoint Vascular bundles: When xylem and phloem are situated on the same radii of vascular bundles, the arrangement is called as conjoint and the vascular bundle is called as conjoint vascular bundles. Such vascular bundles are common in stem and leaves of dicots and monocots.

Which of the following helps in xylem condition?

Note: The xylem parenchyma is made up of axial and radial parenchymatous cells. They have thin cellulose cell walls. They have a prominent protoplasm and nucleus with large vacuole. It is involved in maintenance of xylem transport capacity.

Which condition is present in monocot stem?

Complete answer: In monocot root, secondary growth is absent, xylem and phloem are radial, and around central pith xylem and phloem are arranged in circular fashion many xylem bundles and exarch condition is found in monocots.