NEET UG Botany MCQ-70

Question No:1

Which of the following is not true about sexual reproduction ?

(A) Gametes are diploid in humans
(B) Sperm and ova fuse to form zygote
(C) It introduces new gene combinations in a population
(D) Diploid zygote divides by mitosis

Question No:2

During parthenogenesis as the egg develops wihout meiosis

(A) the offsprings are identical in all inherited respect to the mother
(B) the offsprings are differ in all inherited respect to the mother
(C) there is no relation between mother and offsprings genetically
(D) none of the above

Question No:3

Fusion of two dissimilar gametes is known as

(A) allogamy
(B) anisogamy
(C) autogamy
(D) dichogamy

Question No:4

Bud grafting is commonly used in

(A) litchi
(B) pomegranate
(C) rose
(D) jasmine

Question No:5

Vegetatively propagated plants

(A) show adaptive variations
(B) better fitted in the struggle for existence
(C) stouter than parents
(D) clone of their parents

Question No:6

Grafting is employed for better and quicker yield of good varieties of

(A) apple
(B) citrus
(C) mango
(D) all of these

Question No:7

Apomixis is

(A) development of plants in darkness
(B) development of plants without fusion of gametes
(C) inability to perceive stimulus for flowering
(D) effect of low temperature on plant growth

Question No:8

What is common in Bryophyllum, Scilla and Begonia?

(A) All are members of family Liliaceae
(B) All reproduce only sexually
(C) All reprodce through leaves vegetatively ‘
(D) All lack heterospory

Question No:9

In Amorphophallus and Colocasia vegetative reproduction is carried out through

(A) rhizome
(B) bulbils
(C) corms
(D) offsets

Question No:10

(A):Bacteria divide by amitotic division.
(R): Meiosis occurs in Rhizobium.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:11

(A): Sexual reproduction include both amphigony and parthenogenesis
(R): Amphogony includes both syngamy and conjugation.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:12

(A): Parthenogenesis is a kind of variation of sexual reproduction.
(R): In Parthenogenesis, a young one develops from an ovum but without fertilization.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:13

(A): Gametes are formed in apomixis.
(R): Syngamy is absent in apomixis.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:14

(A): Propagules are formed after triple fusion.
(R): Propagules are the means of reproduction

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:15

(A): Raphanus sativus has tap root system.
(R): Swollen tap roots in Raphanus are the organ of Perennation.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:16

(A):Auxins are applied during cutting or grafting.
(R): Auxins promote root formation.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:17

(A):In banana and rose only vegetative reproduction is prominent method of propagation.
(R): Sexual reproduction does not take place in them.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:18

(A): Characteristics of parental plants can be preserved through vegetative methods.
(R):Vegetative reproduction involves only mitosis.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:19

(A): Parthenogenesis means reproduction of embryo directly from an antipodal cell.
(R): Antipodals are haploid structures occurring in a normal Polygonum embryo sac.

(A) Both Assertion and Reason are true and Reason is correct explanation of A.
(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
(C) Assertion is true but Reason is false.
(D) Assertion is false but Reason is true

Question No:20

Match column-I with column-II and find the correct combination

Column -I—– Column – II
(A) Clone—- (1)Scion
(B) Apomixis– (2)Rament
(C) Grafting –(3) Stolon
(D) Layering — (4)Agamospermy

A B C D

(A) 2 4 13
(B) 2 1 3 4
(C) 3 2 14
(D) 1 2 4 3