10 MCQ on Plant Science for various Agriculture Exams✅ Part -81

102. The universal part of nucellus that is left in seed is called
     (a) Tegmen
     (b) Perisperm
     (c) Testa
     (d) Endosperm

103. In concentration of auxin and cytokinin in callus tissue, differentiation of shoot occurs in
     (a) Lower concentration of cytokinin and higher concentration of auxin
     (b) Higher concentration of cytokinin and lower concentration of auxin
     (c) Equal concentration of auxin and cytokinin
     (d) Only auxin and no cytokinin

104. Induction of somaclonal variation is in
     (a) Producing hybridization barriers
     (b) Producing alkaloids
     (c) Controlling fertilization
     (d) Clonal propagation

105. The fusion product of polar nuclei and male gamete is called
     (a) Zygote
     (b) Triple fusion nucleus
     (c) Secondary nucleus
     (d) Primary endosperm nucleus

106. A Polygonum type embryo sac is
     (a) 7-celled and 7-nucleate
     (b) 8-celled and 8-nucleate
     (c) 7-celled and 8-nucleate
     (d) 8-celled and 7-nucleate

107. Persperm is formed from
     (a) Secondary nucleus
     (b) Degenerate secondary nucleus
     (c) Peripheral part of endosperm
     (d) Remnant nucellus

108. When the general axis and curvature is more pronounced and along with ovule the nucellus also becomes curved and horseshoe shaped, such an ovule is called
     (a) Amphitropous
     (b) Orthotropous
     (c) Campylotropous
     (d) Anatropous

109. When the body of ovule, embryo sac and micropyle lie in the same vertical plane, the ovule is
     (a) Orthotropous
     (b) Anatropous
     (c) Amphitropous
     (d) Campylotropous

110. A Polygonum type embryo sac is
     (a) 7-celled and 7-nucleate
     (b) 8-celled and 7-nucleate
     (c) 7-celled and 8-nucleate
     (d) 8-celled and 8-nucleate

111. Which plant shows distinct juvenile and adult phases?
     (a) Solanum
     (b) Triticum
     (c) Petunia
     (d) Hedera helix

112. A microscopic structure in flower that contains male gametophyte is called
     (a) Only gametophyte
     (b) Pollen tube
     (c) Embryo sac
     (d) Pollen grain

113. Emasculation is achieved by
     (a) Removal of stigma
     (b) Removal of anthers
     (c) Removal of sepals and petals
     (d) Removal of stigmas and sepals

114. Monosporic 8-nucleate embryo sac is of
     (a) Oenothera type
     (b) Allium type
     (c) Polygonum type
     (d) Peperomia type

115. Seeds are considered to evolve from sexual reproduction because
     (a) They are formed by fusion of pollen tube
     (b) They are formed by fusion of gametes
     (c) They are formed by fertilization
     (d) They are formed by differentiation

116. The combination of auxin and cytokinin which is likely to induce shoot differentiation in tobacco callus is
     (a) Orthotropous
     (b) Hemianatropous
     (c) Campylotropous
     (d) Anatropous