Roots Flashcards

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1
Q

Taproot

A

One main root, usually for storage

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2
Q

Fibrous

A

Many small roots instead of one

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3
Q

Adventitious

A

Roots developing from unusual places

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4
Q

Area of maturation

A

Root hairs as extensions of cell walls of epidermis, for absorption of water and minerals

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5
Q

Area of elongation

A

Root tip pushed downward by elongation by cells behind it

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6
Q

Area of cell division

A

Dividing cells of the roots apical meristem

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7
Q

Root cap

A

Thick cells protecting delicate cells above and behind it also means of detecting gravity

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8
Q

Root growth is a continuous process how ?

A

1 area replaces another ans only the tip grows downward

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9
Q

In cross section a root appears as 3 concentric rings

A
  1. Epidermis
  2. Cortex
  3. Stele or vascular cylinder
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10
Q

Epidermis

A

Thin cuticle, mucilaginous sheath

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11
Q

Cortex

A

Storage parenchyma, air spaces

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12
Q

Stele or vascular cylinder

A

Xylem ridges, phloem in btw, pericycle for lateral / branch roots

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13
Q

Endodermis

A

Innermost sub cylinder of the cortex ( cells with impervious hands, casparian strips of suberin which forces water and its contents to pass through the cell membrane by entering the stele

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