2nd Year MCQs Biology
Chapter No. 18 Reproduction
71. Phytochrome exists in two forms i.e. P660 and:
(A) P307
(B) P370
(C) P703
(D) P730
Answer:
(D) P730
72. Phytochrome comprises a pigment and a:
(A) Lipid
(B) Carbohydrate
(C) mineral
(D) Protein
Answer:
(D) Protein
73. It has been found that red light promotes flowering in:
(A) Long day plants
(B) Short day plants
(C) Neutral day plants
(D) None of these
Answer:
(A) Long day plants
74. The hormone florigen is produced in:
(A) Leaves
(B) Flower
(C) Stern
(D) Roots
Answer:
(A) Leaves
75. A form of asexual reproduction in which new individual grows out as a small out growth and eventually separates from parent body is called:
(A) Forming a spore
(B) Budding
(C) Regeneration
(D) Fission
Answer:
(B) Budding
76. Reproduction of egg without fertilization by sperm is termed as:
(A) Parthenogenesis
(B) Parthenocarpy
(C) Regeneration
(D) Budding
Answer:
(A) Parthenogenesis
77. The technique of producing a genetically identical copy of an organism by replacing the nucleus of an unfertilized ovum with the nucleus of a body cell from the organism is:
(A) Budding
(B) Cloning
(C) Parthenocarpy
(D) Fission
Answer:
(B) Cloning
78. Fraternal twins:
(A) Can be only two boys
(B) Can be only two girls
(C) Cannot be one boy and one girl
(D) Can be one boy and one girl
Answer:
(D) Can be one boy and one girl
79. Sexual reproduction is important to avoid:
(A) Variation
(B) Chances of survival
(C) Genetic monotony
(D) All (A) (B) and (C)
Answer:
(C) Genetic monotony
80. Which of the following cell type is haploid?
(A) Primary spermatocyte
(B) Spermatogonium
(C) Sertoli cell
(D) Secondary spermatocyte
Answer:
(D) Secondary spermatocyte
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