NEET Botany MCQ-117

Question No:1

An effective measure to prevent global warming is

(A) Drip – irrigation
(B) afforestation
(C) to provide growth chambers
(D) None

Question No:2

The amount of oxygen produced by a tree depends on

(A) the species of tree
(B) the age of tree
(C) its health
(D) All the above

Question No:3

“The lungs of the world” – are

(A) Plants
(B) Planktons
(C) Human beings
(D) a and b

Question No:4

(A): Hydrophytes do not possess root hairs
(R): Chief anatomical adaptation of hydrophytes is the presense of aerenchyma

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:5

(A): Epidermis of hydrophytes is useful for absorption and assimilation
(R): In hydrophytes the epidermal cells are devoid of cuticle and possess chloroplasts

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:6

A):The stem of hydrophytes is soft, delicate and more or less spongy
R):Most of the hydrophytes show poorly developed sclerenchyma and xylem

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:7

(A):In submerged hydrophytes exchange of gasses takes place through the thin walled epidermis
(R): Stomata are absent in all hydrophytes

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:8

(A):Salvinia is a free floating hydrophyteplants
(R):A11 free floating plants are invariably flowering plants

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:9

(A):Xylem is poorly developed in xerophytes
(R): Absorption of water and salts is carried through the general surface in submerged plants.

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:10

(A):Tribulus survives in the form of seeds during un favorable conditions
(R): Tribulus completes its life cycle within 6 – 8 weeks during un favorable conditions

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:11

(A): The phenomenon of succession is community controlled.
(R):Each group of organisms changes its physical substrate and microclimate to make the conditions favorable for other group of organisms.

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:12

(A): Autotrophic succession is characterised by early and continued dominance of green plants.
(R):It begins in a predominantly organic environment and there is a progressive decline in energy content.

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:13

(A): Crustose lichens are the pioneer community of a litho sere.
(R): During the climax stage of litho sere, the increasing humus content of soil favour the mesophytic vegetation.

(A) If both A and R are true, and R is the correct explanation of A.
(B) If both A and R are true, and R is not the correct explanation of A.
(C) If A is true R is false
(D) If both A and R are false

Question No:14

Both, hydrarch and xerarch successions lead to

(A) medium water conditions
(B) xeric conditions
(C) highly dry conditions
(D) excessive wet conditions

Question No:15

Most of the plants cultivated in agriculture are actually belonging to the succession level

(A) early 10 succession
(B) late 10 succession
(C) early 20 succession
(D) late 20 succession

Question No:16

Lichen is the pioneer vegetation on which succession?

(A) Hydrosere
(B) Lithosere
(C) Psammosere
(D) Xerosere