NEET Biology Online MCQ Test,NCERT CBSE Class 11 online mock test

Plant Ecology Mock Test-3

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