Monday, 30 May 2022

Class 12 Biology - Sexual Reproduction in Flowering Plants (MCQs) #class12Biology #NEET #eduvictors

Class 12 Biology - Sexual Reproduction in Flowering Plants (MCQs)

Class 12 Biology - Sexual Reproduction in Flowering Plants (MCQs) #class12Biology #NEET #eduvictors


Q1. In a cereal grain, the single cotyledon of the embryo is represented by
(a) coleoptile 
(b) coleorhiza
(c) scutellum 
(d) hypocotyl


Q2(NEET 2020). Vegetative propagule in Agave is termed as:
(a) rhizome 
(b) bulbil
(c) offset 
(d) eye


Q3. A particular plant species produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by:
(a) wind 
(b) insects 
(c) water
(d) animals



Q4. In angiosperms, male gametes are formed by the division of 
(a) microspore mother cell 
(b) microspore
(c) generative cell 
(d) vegetative cell


Q5(NEET 2020). Strobili or cones are found in
(a) Pteris 
(b) Marchantia
(c) Equisetum 
(d) Salvinia


Q6. In the embryos of a typical dicot and a grass, true homologous structures are
(a) coleorhiza and coleoptile 
(b) coleoptile and scutellum
(c) hypocotyl and radicle
(d) cotyledons and scutellum 


Q7(NEET 2018). Offsets are produced by
(a) parthenocarpy
(b) mitotic divisions
(c) meiotic divisions
(d) parthenogenesis


Q8. Dioecy states
(a) unisexuality of a flower 
(b) the bisexuality of a flower
(c) the bisexuality of a plant 
(d) unisexuality of a plant


Q9(AIPMT). Why is vivipary an undesirable character for annual crop plants?
(a) It reduces the vigour of the plant
(b) It adversely affects the fertility of the plant
(c) The seeds exhibit long dormancy
(d) The seeds cannot be stored under normal conditions for the next season


Q10(AIPMT). In oogamy, fertilisation involves
(a) a small non-motile female gamete and a large motile male gamete
(b) a large non-motile female gamete and a small motile male gamete
(c) a large non-motile female gamete and a small non-motile male gamete
(d) a large motile female gamete and a small non-motile gamete



Q11(NEET 2020). In water hyacinth and water lily, pollination takes place by
(a) water currents only
(b) wind and water
(c) insects and water
(d) insects or wind



Q12(NEET 2018). Winged pollen grains are present in
(a) Pinus
(b) Cycas
(c) mustard 
(d) mango 


Answers:
1. (c) scutellum 
2. (b) bulbil
3. (a) wind 
4. (a) microspore mother cell 
5. (c) Equisetum 
6. (d) cotyledons and scutellum 
7. (b) mitotic divisions
8. (d) unisexuality of a plant
9. (d) The seeds cannot be stored under normal conditions for the next season
10. (b) a large non-motile female gamete and a small motile male gamete
11. (d) insects or wind
12. (a) Pinus


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