Home
Class 12
BIOLOGY
Which of the following statement(s) is/a...

Which of the following statement(s) is/are correct -
(A) Blue revolution is an effort to increase fish yield.
(B) Indigenous carp includes rohu, catla and mrigal.
(C) Transfer of fingerling into rearing pond is called hypophysation.
(D) Fishes are injected with pituitary extracts to increases spawning

A

A, B, D

B

A, D

C

A, B, C, D

D

A, B only

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • DIVERSITY IN LIVING WORLD (PLANT DIVERSITY)

    ALLEN|Exercise Assertions and Reason|45 Videos
  • EARTHWORM & COCKROACH

    ALLEN|Exercise S|45 Videos

Similar Questions

Explore conceptually related problems

Which of the following statements is correct regarding redox reactions ? (A)An increase in oxidation number of an element is called reduction (B)A decrease in oxidation number of an element is called oxidation. (C)A reagent which lowers the oxidation number of an element in a given substance is reductant. (D)A reagent which increases the oxidation number of an element in a given substance is reductant

Which of the following statements (s) is (are) correct with reference to the ferrous and ferric ions? (a). Fe^(2+) gives brown colour with potassium ferricyanide. (b). Fe^(2+) gives blue precipitate with potassium ferricyanide. (c). Fe^(3+) gives red colour with potassium thiocyanate. (d). Fe^(3+) gives brown colour with potassium thiocyanate.

Which of the following statements are true (A) The entire process of involuntary response to a peripheral nervous stimulation is called reflex action. (B)Information regarding changes in the environment is received by the CNS through the sensory organs which are processed and analysed. (C) Reflex action occurs without conscious effort (D) Reflex action requires the involvement of a part of the CNS (E) Signals from sensory organs goes to spinal cord via ventral root. Choose the correct options from given below:-

which of the following statements is/ are correct regarding normal expiration? (A) it is a passive process (B) it is an active process (C) The volume of thoracic cavity increases (D) The lower ends of the lungs are pulled downwards by the contraction of diaphragm 1) (A),(C) only 2) (A),(B) & (C) only 3) only (A) 4) (A),(C) & (D) only

PQ is a smooth inclined plane whose angle theta can be varied in such a way that point Q remains fixed and P can move on a vertical line PR . A particle slides from rest from point P at different value of theta time for descent from P and Q is noted. The following statement (s) is // are correct about the time of descent : A. the minimum time of descent is 2sqrt(l//g) B. the time descent is minimum continuously as theta is increased C. the time of descent decreases continuously as theta is increased D. the time of descent first decreases then increases.

Read the following statements and choose the correct option A. Increase in melanized moths after industrialization in Great Britain is a proof for natrual selection B. When more individuals of a population acquire a mean character value, it is called disruption C. Changes in allelic frequency in a population will lead to Hardly Weinberg equilibrium D. Genetic drift changes the existing gene ot allelic frequency in future generations

Which of the following statement is // are correct with respect to remedy for plastic waste? a. Polyblend is a fine mixture of recycled modified palstic. b. It is a zero-waste procedure c. It was due to the collaboration of town people of Arcata and biologistis of Humboldt State University d. A blend of polyblend and bitumen enhances bitumen's water - repellent properties and helps to increase road life

Consider the motion of a positive point charge in a region where there are simultaneous uniform eletric and magnetic field E=E_0hatj and B=B_0hatj . At time t=0 , this charge has velocity v in the x-y-plane making an angle theta with the x-axis. Which of the following option(s) is (are) correct for time tgt0? a. If theta=0^0 the charge moves in a circular path in the xy-plane. b.If theta=0^0 the charge undergoes helical motion with constant pitch along the y-axis. c. If theta=1 0^0 the charge undergoes helicalmotion with its pitch increasing with time along the y -axis. d. If theta=90^@ the charge undergoes linear but accelerated motion along the y -axis.