Which of the following has proved helpful in preserving pollen as fossils? [2018]
(a) Pollenkitt (b) Cellulosic intine (c) Sporopollenin (d) Oil content
2. Pollen grains can be stored for several years in liquid nitrogen having a temperature of : [2018]
(a) – 120°C (b) – 80°C (c) – 160°C (d) – 196°C
3. Double fertilisation is: [2018]
(a) fusion of two male gametes of a pollen tube with two different eggs.
(b) fusion of one male gamete with two polar nuclei.
(c) syngamy and triple fusion.
(d) fusion of two male gametes with one egg.
4. Attractants and rewards are required for [2017]
(a) Entomophily (b) Hydrophily (c) Cleistogamy (d) Anemophily
5. Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by: [2017]
(a) Bee (b) Wind (c) Bat (d) Water
6. A dioecious flowering plant prevents both: [2017]
(a) Autogamy and geitonogamy (b) Geitonogamy and xenogamy
(c) Cleistogamy and xenogamy (d) Autogamy and xenogamy
7. Functional megaspore in an angiosperm develops into: [2017]
(a) Endosperm (b) Embryo sac (c) Embryo (d) Ovule
8. Which one of the following statements is not true? [2016]
(a) Tapetum helps in the dehiscence of anther.
(b) Exine of pollen grains is made up of sporopollenin.
(c) Pollen grains of many species cause severe allergies.
(d) Stored pollen in liquid nitrogen can be used in the crop breeding programmes.
9. Which of the following statements is not correct? [2016]
(a) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the
same species grows into the style.
(b) Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.
(c) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting
with those of the pistil.
(d) Some reptiles have also been reported as pollinators in some plant species.
10. Filiform apparatus is characteristic feature of : [2015]
(a) Nucellar embryo (b) Aleurone cell (c) Synergids (d) Generative cell
11. Which one of the following may require pollinators, but is genetically similar to autogamy? [2015]
(a) Xenogamy (b) Apogamy (c) Cleistogamy (d) Geitonogamy
12. Which one of the following statements is not true? [2015]
(a) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.
(b) The flowers pollinated by flies and bats secrete foul odour to attract them.
(c) Honey is made by bees by digesting pollen collected from flowers.
(d) Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups.
13. The hilum is a scar on the [2015]
(a) fruit, where it was attached to pedicel. (b) fruit, where style was present.
(c) seed, where micropyle was present. (d) seed, where funicle was attached.
14. Which of the following are the important floral rewards to the animal pollinators? [2015]
(a) Nectar and pollen grains. (b) Floral fragrance and calcium crystals.
(c) Protein pellicle and stigmatic exudates. (d) Colour and large size flower.
15. Geitonogamy involves [2014]
(a) fertilisation of a flower by the pollen from another flower of the same plant.
(b) fertilisation of a flower by the pollen from the same flower.
(c) fertilisation of a flower by the pollen from a flower of another plant in the same population.
(d) fertilisation of a flower by the pollen from a flower of another plant belonging to a distant population.
16. Male gametophyte with least number of cell is present in [2014]
(a) Pteris (b) Funaria (c) Lilium (d) Pinus
17. Function of filiform apparatus is to [2014]
(a) recognise the suitable pollen at stigma. (b) stimulate division of generative cell.
(c) produce nectar. (d) guide the entry of pollen tube.
18. Non-albuminous seed is produced in: [2014]
(a) Maize (b) Castor (c) Wheat (d) Pea
19. Which one of the following statements regarding post-fertilization development in flowering plants is incorrect ? [NEET-2019]
(1) Ovary develops into fruit (2) Zygote develops into embryo
(3) Central cell develops into endosperm (4) Ovules develop into embryo sac
20. Persistent nucellus in the seed is known as : [NEET-2019]
(1) Chalaza (2) Perisperm (3) Hilum (4) Tegmen
21. What is the fate of the male gametes discharged in the synergid? [NEET-2019]
(1) One fuses with the egg, other(s) degenerate(s) in the synergid.
(2) All fuse with the egg.
(3) One fuses with the egg, other(s) fuse(s) with synergid nucleus.
(4) One fuses with the egg and other fuses with central cell nuclei.
22. Which is the most common type of embryo sac in angiosperms ? [NEET-2019 ODISSA]
(1) Tetrasporic with one mitotic stage of divisions
(2) Monosporic with three sequential mitotic divisions
(3) Monosporic with two sequential mitotic divisions
(4) Bisporic with two sequential mitotic divisions
23. What type of pollination takes place in Vallisneria? [NEET-2019 ODISSA]
(1) Pollination occurs in submerged condition by water
(2) Flowers emerge above surface of water, and pollination occurs by insects.
(3) Flowers emerge above water surface, and pollen is carried by wind.
(4) Male flowers are carried by water currents to female flowers at surface of water
24. In which one of the following, both autogamy and geitonogamy are prevented?
[NEET-2019 ODISSA]
(1) Wheat (2) Papaya (3) Castor (4) Maize
25. Which of the following is incorrect for wind-pollinated plants ? [NEET-2020 COVID]
(1) Well exposed stamens and stigma (2) Many ovules in each ovary
(3) Flowers are small and not brightly coloured (4) Pollen grains are light and non-sticky
26. The body of the ovule is fused within the funicle at [NEET-2020]
1) Chalaza 2) Hilum 3) Micropyle 4) Nucellus
27. In water hyacinth and water lily, pollination takes place by [NEET-2020]
1) Insects and water 2) Insects or wind 3) Water currents only 4) Wind and water
28. The plant parts which consist two generations -one within the other. [NEET-2020]
a) Pollen grains inside the anther b) Germinated pollen grain with two male gametes
c) Seed inside the fruit d) Embryo sac inside the ovule
1) a and d 2) a only 3) a, b, and c 4) c and d
29. A typical angiosperm embryo sac at maturity is [NEET-2021]
1) 7- nucleate and 8 – celled 2) 7- nucleate and 7- celled
3) 8 –nucleate and 8- celled 4) 8- nucleate and 7- celled
30. The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, brings genetically different types of pollen grains to stigma is [NEET-2021]
1) Geitonogamy 2) Chasmogamy 3) Cleistogamy 4) Xenogamy
31. In some members of which of the following pairs of families, pollen grains retain their visibility for months after release? [NEET-2021]
1) Poaceae ; Leguminosae 2) Poaceae ; Solanaceae
3) Rosaceae ; Leguminosae 4) Poaceae ; Rosaceae
32. Identify the incorrect statement related to pollination: [NEET-2022]
1) Pollination by water is quite rare in flowering plants
2) Pollination by wind is more common amongst abiotic pollination
3) Flowers produce foul odours to attract flies and beetles to get pollinated
4) Moths and butterflies are the most dominant pollinating agents among insects
33. Given below are two statements: [NEET-2022]
Statement I: Cleistogamous flowers are invariably autogamous
Statement II: Cleistogamy is disadvantageous as there is no chance for cross pollination
In the light of the above statements, choose the correct answer from the options given
Below.
1) Bothe Statement I and Statement II are correct
2) Bothe Statement I and Statement II are incorrect
3) Statement I is correct but Statement II is incorrect
4) Statement I is incorrect but Statement II is correct
34. Which part of the fruit, labelled in the given figure makes it a false fruit? [NEET-2022]
- A-Mesocarp
- B- Endocarp
- Thalamus
- Seed
NEET PREVIOUS YEARS QUESTIONS-ANSWERS
1 (c) 2 (d) 3 (c) 4 (a) 5 (b) 6 (a) 7 (b) 8 (a) 9 (a) 10 (c)
11 (d) 12 (c) 13 (d) 14 (a) 15 (a) 16 (c) 17 (d) 18 (d) 19 (4) 20 (2)
21 (4) 22 (2) 23 (4) 24 (1) 25 (2) 26 (2) 27 (2) 28 (1) 29 (4) 30 (4)
31 (3) 32 (4) 33 (1) 44 (3)
NEET PREVIOUS YEARS QUESTIONS-EXPLANATIONS
1. (c) Sporopollenin cannot be degraded by enzyme; strong acids and alkali, therefore it is helpful in preserving pollen as fossil.
2. (d) Pollen grains can be stored for several years in liquid nitrogen at -196°C (cryopreservation).
3. (c) Double fertilisation is a unique phenomenon that occurs in angiosperms only.
4. (a) Insect pollinated plants provide rewards as edible pollen grain and nectar as usual rewards. In order to materialise and maximise pollination, flowers have developed a set of attributes which are aimed at attracting the pollinators called attractants.
5. (b) Wind pollination or anemophily occurs in flowers which are having a single ovule in each ovary, and numerous flowers packed in an inflorescence. It is a nondirectional pollination.
6. (a) Autogamy occurs in bisexual flowers. Geitonogamous flowers are unisexual but present in the same plant. Dioecious condition is observed when unisexual male and female flowers are present on different plants and it prevents both autogamy and geitonogamy.
7. (b) The first cell of female gametophytic generation in angiosperm is megaspore. It undergoes three successive mitotic division to form 8-nucleated and 7-celled embryo sac.
8. (a) Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.
9. (a) Pollen grains of different species are incompatible, so they fail to germinate. If the pollen-stigma interaction is compatible, the pollen grain hydrates and germinates shortly following landing on the stigma.
10. (c) Synergids have filiform apparatus.
11. (d) Geitonogamy, genetically, shows similarity with autogamy because the pollen grains are borne on the same plant.
12. (c) Honey is produced by worker bees using nectar (fructose) of flowering plants.
13. (d) The hilum is a scar found on the seed coat through which the developing seeds are attached to the fruit.
14. (a) Nectar and pollen grains are the usual floral rewards which the animal pollinators get.
15. (a) Geitonogamy is the transfer of pollen grains in different flowers of same plant.
16. (c) Male gametophyte is highly reduced in angiosperm and is known as pollen grain. It is 2 or 3-celled.
17. (d) Filiform apparatus helps in the entry of pollen tube into a synergid in ovule. Filiform apparatus is in form of finger like projection comprising a core of microfibrils enclosed in a sheath. It resembles transfer cells meant for short distance movement of metabolites. It is responsible for the absorption of food from the nucleus.
18. (d) Exalbuminous (non-endospermic) seeds usually store reserve food material in cotyledons. In these seeds, the endosperm is used up and not present in mature seeds, e.g., bean, gram and pea.
26. The body of the ovule is fused within the funicle at hilum
27. water hyacinth and water lily are aquatic plants pollinated by insects or wind
28. Pollen grains is male gametophyte present within the parental sporophytic structure anther
Embryo sac is female gametophyte present within the parental sporophytic structure ovule
29. 8-nucleate and 7-celled
30. Xenogamy
31. Rosaceae; Leguminasae
32. Bees are the most dominant pollinates agents among insects.
33. Both the statement are correct
34. ‘C’ is thalamus which is edible part in the apple fruit