Animal cognition

Some animal, especially many mammal, bird have cognitive ability that  extend to reasoning, problem solving, tool used and symbolic  communication.

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In Meristematic zone, 

cells divide both in the direction of the root base to form cells that will differentiate into the tissues of the functional root and in the direction of the root apex to form the root cap

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Cell division in the root apex proper is relatively slow; thus, this region is called the quiescent center

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In elongation zone, cells elongate rapidly and undergo a final round of divisions to produce a central ring of cells called the endodermis

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Feature of root

Most Vascular plants has two types of roots;

I. Primary Roots (Tap root) that grow downward

II. Secondary Roots that branch out to the side

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I. Tap root system

A single, thick Primary root, called Taproot, with smaller Secondary Roots going out from the sides

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I. Tap root system

Tap root system found in Dicot Plants.

e.g., Mustard, Pulses, Fiscus, Mango tree, Banyan

Families- Brassicaceae, Lamiaceae, Rutaceae, Fabaceae, Moraceae, Malvaceae, Apocynaceae, Compositae, Rosaceae, Cucurbitaceae, Leguminosae, Solanaceae etc.