Plants came on land before animals. All the following were evolutionary adaptations for terrestrial life except:
1. guard cells
2. C3 photosynthesis
3. rhizoids
4. vascular bundles

Subtopic:  Introduction |
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Trace the correct path of water from the soil through the plant to the atmosphere:

1. endodermis- cortex - epidermis - vessel elements - intercellular spaces in mesophyll - stomata.
2. epidermis - cortex - Casparian strip - endodermis - sieve cells - intercellular spaces in the mesophyll - stomata.
3. Casparian strip - root hairs - epidermis - cortex - xylem - endodermis - intercellular spaces in mesophyll - stomata.
4. root hairs - cortex - endodermis - vessel elements - intercellular spaces in mesophyll - stomata.
Subtopic:  Long Distance Transport of Water |
 68%
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Closure of stomata occurs as the guard cells:
1. lose water.
2. begin photosynthesis reducing internal CO2 concentration.
3. pick up chloride ions.
4. gain potassium ions.

Subtopic:  Stomata |
 66%
From NCERT
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Guttation is:
1. deposition of dew drops on the leaves in the morning.
2. shrinking of protoplast away from the cell wall.
3. evidence of root pressure.
4. cavitation in the water column.

Subtopic:  Transpiration & Guttation |
 53%
From NCERT
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A column of water in the xylem even in a tall tree normally does not sink because of its weight due to:

1. the exceptionally large diameter of vessels.
2. bubbles too large to be transported even through the pits.
3. the presence of strong ion concentrations near the top of the tree.
4. the tensile strength of a column of water.
Subtopic:  Transpiration & Guttation |
 83%
From NCERT
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The type of phyllotaxy seen in most angiosperms is:
1. Alternate
2. Opposite
3. Whorled
4. Random

Subtopic:  Transpiration & Guttation |
 62%
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A plant treated with a fungicide may develop:
1. Loss of root hair
2. Inhibition of transport proteins in root cells
3. Deficiency of mineral
4. Formation of root knots

Subtopic:  Photosynthesis Transpiration Compromise & Mineral Translocation |
 51%
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For most crops a leaf area index is common up to:
1. 1
2. 7
3. 10
4. 14

Subtopic:  Transpiration & Guttation |
 54%
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The apoplast pathway in plants includes all the following except:
1. the lumen of a xylem vessel
2. the lumen of a sieve tube
3. the lumen of tracheids
4. the cell wall of a root hair

Subtopic:  Pathways of transport |
 58%
From NCERT
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The ions that plays the primary role in basic transport processes in plant cells is:
1. Na+
2. K+
3. H+
4. Cl-

Subtopic:  Photosynthesis Transpiration Compromise & Mineral Translocation |
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