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Plant Kingdom · Question 84

AIPMT 2007MCQEasy📈 Topic in 38% papers+4−1
1

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

  1. Nature of stored food materials in the cell
  2. Structural organization of thallus
  3. Chemical composition of the cell wall
  4. Types of pigments present in the cell

Answer

(4) Types of pigments present in the cell

Solution

As per NCERT, algae are divided into three main classes — Chlorophyceae, Phaeophyceae and Rhodophyceae — and these names themselves refer to the dominant pigment: green (chlorophyll a, b), brown (fucoxanthin) and red (r-phycoerythrin).

∵ Stored food, cell wall and thallus organisation help in describing the classes but the primary basis is the type of pigments ⇒ (4).

Answer: (4)

AIPMT 2007

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2

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

  1. there is high degree of sterility
  2. one can conclude that the plant is apomictic
  3. self fertilization is prevented
  4. there is no change in success rate of fertilization
AIPMT 2007
3

Peat moss is used as a packing material for sending flowers and live plants to distant places because

  1. it serves as a disinfectant
  2. it is easily available
  3. it is hygroscopic
  4. it reduces transpiration
AIPMT 2006
4

Conifers differ from grasses in the

  1. formation of endosperm before fertilization
  2. production of seeds from ovules
  3. lack of xylem tracheids
  4. absence of pollen tubes
AIPMT 2006
5

In a moss, the sporophyte

  1. manufactures food for itself, as well as for the gametophyte
  2. is partially parasitic on the gametophyte
  3. produces gametes that give rise to the gametophyte
  4. arises from a spore produced from the gametophyte
AIPMT 2006
6

Ectophloic siphonostele is found in

  1. Osmunda and Equisetum
  2. Marsilea and Botrychium
  3. Adiantum and Cucurbitaceae
  4. Dicksonia and Maiden hair fern.
AIPMT 2005
7

Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characterised features of

  1. cycads
  2. conifers
  3. polypetalous angiosperms
  4. gamopetalous angiosperms
AIPMT 2005
8

Phenetic classification of organisms is based on

  1. observable characteristics of existing organisms
  2. the ancestral lineage of existing organisms
  3. dendrogram based on DNA characteristics
  4. sexual characteristics
AIPMT 2004
9

Angiosperms have dominated the land flora primarily because of their

  1. power of adaptability in diverse habitat
  2. property of producing large number of seeds
  3. nature of self pollination
  4. domestication by man
AIPMT 2004
10

Which one of the following is living fossil ?

  1. Cycas
  2. Moss
  3. Spirogyra
  4. Saccharomyces
AIPMT 2004
11

Phenetic classification of organisms is based on

  1. observable characteristics of existing organisms
  2. the ancestral lineage of existing organisms
  3. dendrogram based on DNA characteristics
  4. sexual characteristics.
AIPMT 2003

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