10 MCQ on Plant Science for various Agriculture Exams✅ Part -103

 

1. Flower is considered to be modified shoot because
   (a) Flowers aggregate to form inflorescence
   (b) In some flowers thalamus becomes elongated and show distinct nodes and internodes
   (c) Essential organs are present in some flowers
   (d) Epicalyx is present in some flowers

2. A flower is said to be actinomorphic if it can be divided in two—
   (a) Halves having sepals and petals in equal numbers
   (b) Exactly equal halves by any vertical section through centre
   (c) Similar halves by a single vertical section only
   (d) Both (a) and (c)

3. A bisexual flower which never opens in its life span is called—
   (a) Heterogamous
   (b) Homogamous
   (c) Cleistogamous
   (d) Dichogamous

4. Perianth is—
   (a) When petals and stamens are not distinguishable
   (b) When only calyx is present
   (c) Outer part of flower in which calyx and corolla are not distinguishable
   (d) None of the above

5. Empty glumes are—
   (a) Petals
   (b) Bracts
   (c) Stamens
   (d) Carpels

6. When stamens are adnate to perianth leaves it is known as—
   (a) Epipetalous
   (b) Epiphyllous
   (c) Gynandrous
   (d) Epipetalous

7. Which of the following shows apocarpous condition?
   (a) Datura
   (b) Ranunculus
   (c) Caesalpinia
   (d) Cotton

8. An ovary with ovules on three parietal placenta is called—
   (a) Unilocular
   (b) Bilocular
   (c) Trilocular
   (d) Pentalocular

9. Pollinia are sac-like structures—
   (a) Which secrete yellow substance called pollenkitt material
   (b) In which pollen grains are present in mass
   (c) In which anther lobes are present
   (d) Which are found in megasporangia

10. In which of the following plants pollinia occur?
    (a) Calotropis
    (b) Mangifera
    (c) Citrus
    (d) Rose

11. Plants in which both male and female flowers occur on the same plant are called—
    (a) Polygamous
    (b) Monoecious
    (c) Dioecious
    (d) Bisexual

12. Transferring apparatus is found in—
    (a) Ovules of pea
    (b) Ovules of Calotropis
    (c) Pollen grains of mango
    (d) Pollen grains of mustard

13. A flower is said to be incomplete when it has—
    (a) Calyx and corolla only
    (b) Androecium and gynoecium only
    (c) Androecium and corolla only
    (d) Gynoecium and calyx only

14. In a typical flower, the ovary is superior in—
    (a) Epigynous flower
    (b) Hypogynous flower
    (c) Perigynous flower
    (d) Epiperigynous flower

15. In a perigynous flower—
    (a) Ovary is superior
    (b) Ovary is inferior
    (c) Ovary is half inferior and half superior
    (d) Ovary is obliquely placed

16. Epicalyx represents—
    (a) A whorl of bracteoles
    (b) An additional whorl of calyx
    (c) A whorl of bracts
    (d) A whorl of sepals

17. The term tetradynamous is applied where there are—
    (a) 4 stamens – 2 short and 2 long
    (b) 6 stamens – 2 short and 4 long
    (c) 8 stamens – 4 short and 4 long
    (d) 12 stamens – 6 short and 6 long

18. Arrangement of sepals and petals with respect to each other is called—
    (a) Aestivation
    (b) Vernation
    (c) Phyllotaxy
    (d) Venation

19. When ovary is pear-shaped, ovules develop all along the thalamus below ovary, the placentation is—
    (a) Free central
    (b) Basal
    (c) Axile
    (d) Superficial

20. Which of the following has both male and female sex organs in the same flower?
    (a) Papaya
    (b) Date palm
    (c) Nutmeg
    (d) Hibiscus

21. The stalk which attaches the ovules with the ovary is—
    (a) Chalaza
    (b) Placenta
    (c) Funicle
    (d) Pedicel

22. The ovule is attached to the placenta by—
    (a) Hilum
    (b) Funicle
    (c) Petiole
    (d) Pedicel

23. In angiosperms, an ovule represents—
    (a) Megasporophyll
    (b) Megasporangium
    (c) Megaspore
    (d) A megaspore mother cell

24. Synandrium means fusion of—
    (a) Only filaments
    (b) Only anthers
    (c) Both filaments and anthers
    (d) Part of the stamens