NEET Biology Plant Ecology Mock-Test-3
In submerged hydrophytes, gaseous exchange occurs through
(A) Hydathodes
(B) Stomata
(C) General body surface
(D) Injured parts
Useful adaptation for hydrophytes
(A) Large leaves
(B) Decrease in mechanical tissue
(C) Large mechanical tissue
(D) Increase in aerenchyma
Hydrophytes like Nymphaea and Nelumbo are
(A) Free floating hydrophytes
(B) Amphibious plant
(C) Submerged rooted hydrophytes
(D) Rooted hydrophytes with free floating leaves
Anatomically all hydrophytes are similar in having
(A) Aerenchyma
(B) Collenchyma
(C) Stomata
(D) Cuticle
Ephemeral plants are categorized under
(A) Drought enduring plants
(B) Drought escaping plants
(C) True xerophytes
(D) Drought avoiding plants
Drought avoiding plants are
(A) Hydrophytes
(B) Mesophytes
(C) Succulents
(D) Parasites
Which one suffers from both external and internal dryness
(A) Opuntia
(B) Zizyphus
(C) Tribulus
(D) Aloe
The xerophyte with succulent phylloclades
(A) Casuarina
(B) Ruscus
(C) Aloe
(D) Opuntia
Sunken stomata are present in
(A) Xerophytes
(B) Hydrophytes
(C) Mesophytes
(D) Air the above
Sunken stomata and multiple epidermis occur in
(A) Hydrilla
(B) Mangifera
(C) Nerium
(D) Vallisneria
Well developed mechanical tissues and vascular tissues are seen in
(A) Hydrophytes
(B) Mesophytes
(C) Xerophytes
(D) Halophytes
True xerophytes are
(A) Ephemeral plants of deserts
(B) Succulent plants
(C) Non – succulent perennials
(D) None of the above
Identify a pair of xerophytes, whose aerial parts are succulent
(A) Asparagus and Ceiba
(B) Ceiba and Aloe
(C) Opuntia and Bryophyllum
(D) Asparagus and Aloe
Water storage tissue is present in
(A) Acacia
(B) Opuntia
(C) Calotropis
(D) Hydrilla
The ephemeral Tribulus tides over the dry conditions
(A) By its tuberous stem
(B) By its aerial stem
(C) In the form of seeds
(D) By storing water in different parts of its body
Multiple epidermis, sunken stomata, with stomatal hairs in Nerium leaf represent
(A) Xerophytic adaptation
(B) Mesophytic a daptation
(C) Hydrophytic adaptation
(D) Halophytic adaptation
An adaptation usually found in many xerophytes is
(A) Thin epidermis
(B) Stomata in pits
(C) Waxy coating
(D) Thick spines
A feature useful to minimise water loss in xerophytes is
(A) Extensive root system
(B) Thick cuticle
(C) Well developed water storage parenchyma
(D) Undivided lamina
The correct pair of plants, which can withstand prolonged period of drought
(A) Casuarina, Tribulus
(B) Nerium, Tribulus
(C) Ziziphus, Tribulus
(D) Casuarina, Calotropis