NEET BIOLOGY

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BIOLOGICAL CLASSIFICATION

KINGDOM PLANTAE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following statements are the characteristics of plants from the class Dicotyledonae of the phylum Anthophyta?I. In the stem, vascular bundles are arranged in a ring formII. In the roots, the xylem is located at the centreIII. Tap rootsIV. Floral parts are divisible by four or five
A
I, II and III
B
I, II and IV
C
II, III and IV
D
I, II, III and IV
Explanation: 

Detailed explanation-1: –Monocots usually have collateral vascular bundles, a type that is also called closed.-The vascular bundle is enclosed by a bundle sheath of parenchyma cells in the cortex region.-Monocot stems have most of their vascular bundles near the outside edge of the stem.-There is no pith region in monocots.

Detailed explanation-2: -The vascular bundles of dicot stems contain a layer of meristem cells, called the cambium (or vascular cambium), located between the xylem and phloem. See it in 3D! Function: These cells facilitate secondary growth, dividing to create new xylem and phloem cells, and thus widening the girth of the stem.

Detailed explanation-3: -Vascular bundles of dicot stem are open, because of presence of cambium.

Detailed explanation-4: -In a dicot root, the meristematic region present between the xylem and the phloem of open vascular bundles is called the intrafascicular cambium.

There is 1 question to complete.
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