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31 Years NEET Previous Year Questions: Plant Kingdom - 3


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31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 1

Flagellated male gametes are present in all the three of which one of the following sets? [2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 1

The male gametes of bryophytes are biflagellate, and those of pteriodophytes are multiflagellate, except Selaginella having biflagellate gametes. The male gametes of gymnosperms are non motile except those of Cycas having multiciliate gametes. 

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 2

If you are asked to classify the various algae into distinct groups, which of the following characters you should choose? [2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 2

It will be types of pigment present in the cell like Rhodophyceae shows presence of phycoerythrin, chlorophyceae shows  presence of phycocyanin in etc.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 3

In the prothallus of a vascular cryptogam, the antherozoids and eggs mature a different times. As a result [2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 3

In the prothallus of a vascular cryptogams the antherozoids and eggs mature at different times which result in failurity of self-fertilization.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 4

Conifers differ from grasses in the [2006]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 4

Conifers (Gymnosperms) differ from grasses (angiosperms) because in gymnosperms the female gametophyte is actually endosperm which is made before fertilization. While in grasses endosperm is a tissue formed by the fertilization of second male gamete to polar nuclei. Moreover in gymnosperms the endosperm is a haploid tissue while in angiosperms it is triploid.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 5

Peat Moss is used as a packing material for sending flowers and live plants to distant places because [2006]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 5

Peat Moss is used wherever we require to retain water for a long because Peat Mosses are hygroscopic in nature and they absorb the moisture from the atmosphere and this moisture keep the living materials and flowers fresh for a long time.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 6

In a moss the sporophyte [2006]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 6

In moss main plant body is gametophyte & sporophyte is  meant for spore dispersal mainly. Hence it is called that the sporophyte is partially parasitic on gametophyte.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 7

Match items in Column I with those in Column II 

Select the correct answer from the following:

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 7

Peritrichous flagellation : Flagella all around e.g. Escherichia coli.
Living fossil : Organisms which have undergone very little change since they first evolved e.g. Ginkgo.
Rhizophore : Rhizophores are present in Selaginella which is a colourless, leafless, positively geotropic, elongated structure.
Smallest flowering plant : Wolffia.
Largest perennial alga : Macrocystis.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 8

Which one of the following is a living fossil? [2003, 04]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 8

Ginkgo biloba is called the living fossil. But Cycas revoluta a native of China and Japan common known as “Tesso” or Sago palm” is also called living fossil due to its primitive characters.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 9

Which of the following propagates through leaf- tip? [2004]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 9

In mosses vegetative propagation  occurs by fragmentation. Marchantia is a liverwort in which propagation also occurs by fragmentation. Walking fern Adiantum propagates through leaf tip.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 10

Which one pair of examples will correctly represent the grouping Spermatophyta according to one of the schemes of classifying plants ? [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 10

Spermatophytes are the seed plants. They are the plants bearing seeds containing a dormant embryo. It includes gymnosperms and angiosperms. Ginkgo belongs to group gymnosperms and pisum belongs to group angiosperms.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 11

Which one of the following pairs of plants are not seed producers? [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 11

Pteridophytes (fern) and bryophytes (Funaria) are seedless plants. Gymnosperms (pines) and angiosperms (Ficus) are seed bearing plants.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 12

Sexual reproduction in Spirogyra is an advanced  feature  because it shows [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 12

 Sexual reproduction in Spirogyra occurs by conjugation involving union of two gametes. The fusing gametes are similar but one is more active and passes into the other cell. This differentiation of gametes is called physiological anisogamy.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 13

Which of the following is without exception in angiosperms? [2002]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 13

Vesselless angiosperms are Wintera, Trochodendron etc. Secondary growth is absent in some angiosperms. Angiospermic plants are autotrophic in nutrition. But some angiosperms are heterotrophic in nutrition. The 4 special modes of nutrition and their examples are: (i) Saprophytic : e.g. Neottia, Monotropa. (ii) Symbiotic – e.g. Mycorrhiza-between fungus and roots of higher plants. (iii) Parasitic – Cuscuta. (iv) Insectivorous plant – Nepenthes.
Double fertilization is characteristic of all angiosperms.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 14

Which of the following plants produces seeds but not flowers? [2002]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 14

 Maize, Mint and Peepal are flowering plants or angiosperms but Pinus is a gymnosperm in which seeds are produced but flowers are not produced or seeds are not enclosed in flowers.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 15

Cycas have two cotyledons but not included in angiosperms because of [2001]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 15

In Cycas (gymnosperm) the seed does not occur inside a fruit but lies naked  or exposed on the surface of megasporophyll.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 16

A research student collected certain alga & found its cell contained both chlorophyll-a,b,c & chlorophyll-d as well as phycoerythrin.The alga belongs to [2000]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 16

In green algae, the photosynthetic pigments are chlorophyll a & b,     carotenes and xanthophylls. In phaeophyceae, the pigments are chlorophyll a, chlorophyll c and carotenes and xanthophylls. Phycoerythrin gives red colour to Rhodophyceae.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 17

Floridean starch is found in [2000]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 17

Reserve  food in red algae   (Rhodophyceae) is Floridean starch. In green algae (Chlorophyceae), reserve food is starch. In brown algae, reserve food is laminarin and manitol. In cyanophyceae reserve food is cyanophycean starch.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 18

One of the most important reasons why wild plants should thrive is that they are good sources of [2000]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 18

Wild varieties have the genes for the resistance to disease and pests.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 19

In Ferns meiosis occurs when [2000]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 19

Gametic meiosis is found in all animals.  In sporic meiosis the sporophyte produces sporangia where meiosis occurs producing haploid spores.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 20

The largest ovules, largest male and female gametes and largest plants are found among  [2000]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 20

Egg of  Cycas (Gymnosperms) and its nucleus are the  largest in the plant kingdom. The sperms of Cycas are also the largest in the plant kingdom.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 21

Fusion of two motile gametes which are dissimilar in size is termed as

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 21

Fusion of two motile gametes which are dissimilar in size is termed as anisogamy.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 22

Columella is a specialised structure found in the  sporangium of [1999]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 22

Ulothrix is a green alga. Spirogyra is a filamentous green alga. In Rhizopus the columella bears the spores for asexual reproduction

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 23

Which of the following is true about bryophytes? [1999]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 23

Bryophytes are non vascular embryophytes characterized by the presence of an independent gametophyte and a parasitic sporophyte. Plant body is either thalloid or foliose. Archegonium is the flask shaped female sex organ. They bear chloroplast.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 24

In which of the following would you place the plants having vascular tissue lacking seeds? [1999, 2000]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 24

Pteridophytes are primitive seedless vascular plants. Bryophytes are non vascular embryophytes. Gymnosperms are seed plants in which conducting part of xylem consist of tracheids. Algae are non-vascular photosynthetic aquatics forming accessory spores for asexual reproduction.

31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 25

Bryophytes comprise [1999]

Detailed Solution for 31 Years NEET Previous Year Questions: Plant Kingdom - 3 - Question 25

 In bryophytes, the dominant and independent living phase of the life cycle is gametophyte. Sporophyte is always attached and dependent upon the gametophytic plant body for water supply, fixation, and part or  whole nutrient requirement. 

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