First the ..... roots and thereafter the ..... roots were evolved in the plant evolutionary process

ROOTS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

First the ____ roots and thereafter the ____ roots were evolved in the plant evolutionary process

A	fibrous, tap
B	tap, fibrous

Explanation:

Detailed explanation-1: -Roots were an early development in plant life, evolving on land during the Devonian Period, 416 to 360 million years ago (Gensel et al., 2001; Raven and Edwards, 2001; Boyce, 2005; Kenrick, 2013).

Detailed explanation-2: -Land plants evolved from a group of green algae, perhaps as early as 850 mya, but algae-like plants might have evolved as early as 1 billion years ago.

Detailed explanation-3: -In some plants, the roots change their shape and get modified to absorb and transport water and minerals from the soil to different parts of the plant. They are also modified for support, food storage, and respiration. The root modifications perform two major functions-Physiological and Mechanical.

Detailed explanation-4: -Taproot consists of the one, long main root, where secondary, tertiary and rootlets are visible. Even the primary root is very thick as compared to other roots (Carrot, Radish). Whereas fibrous oradventitious roots contains short-lived roots, which are shallow and the growth can be either underground or aerial.

There is 1 question to complete.

AP BIOLOGY

PLANTS

ROOTS