A. Well developed stomata
B. Well developed aerenchyma
C. Well developed root system
D. Well developed vascular system
Related Mcqs:
- In submerged hydrophytes entry of CO2 is through:
A. Epidermis as dissolved CO2
B. Epidermis as carbonates only
C. Epidermis as carbonates only
D. Both (b) and (c) - Submerged hydrophytes have well developed:
A. Vascular system
B. Aerenchyma
C. Root system
D. Stoma - Useful adaptation of hydrophytes is:
A. Large leaves
B. Decrease in mechanical tissue
C. Large mechanical tissue
D. Increase in aerenchyma - In submerged hydrophytes, which of the following is present?
A. Air spaces
B. Cuticle
C. Well developed sclerenchyma
D. Well developed vascular tissues - In submerged hydrophytes, functional stomata are found:
A. On upper surface of the leaf
B. Lower surface of the leaf
C. Both the surfaces of the leaf
D. Nowhere on the plant - Hydrophytes (Aquatic Plants) means:
A. A reduction of the protective, conducting and supporting tissues
B. Absences of palisade tissue
C. Both (a) & (b)
D. None of these - In western Himalayas, the Betula trees usually occur in:
A. Tropical zone
B. Sub-tropical zone
C. Alpine zone
D. Temperate zone - Plants growing in xerophytic conditions usually have:
A. Feebly developed root system
B. Deep and much branched root system
C. Well developed leaves
D. III developed vascular system - Plants growing near sea shore will usually have xerophytic characters, like thick leaves, because:
A. There is plenty of water in the soil
B. There is too high a concentration of salts for the plants to absorb sufficient water from the soil
C. Light available to plant is not sufficient
D. The soil is muddy - The calcium carbonate content which is usually between 6 and 10%, has reached into the deeper layers, forming a zone of lime nodules (Kankar) at about _____ depth:
A. 70-100 cm
B. 80-110cm
C. 90-120 cm
D. None of these
The correct answer to the question: "Hydrophytes usually have:" is "Well developed aerenchyma".