Tag: botany

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Questions Related to botany

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

Find the incorrect statement.
(A) Nepenthus, Drosera and Dionea are the insectivorous plants.
(B) Cuscuta, Loranthus and santalum are root parasites.
(C) Rafflesia is a saprophytic angiosperm.
(D) Mangrove plants are seen in saline marshy lands. 

  1. B and C

  2. A and D

  3. A and C

  4. B and D
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rafflesia is a genus of parasitic flowering plants. It contains approximately 28 species, all found in southeastern Asia, in Indonesia, Malaysia, Thailand and the Philippines. It is not a saprophytic angiosperm. Cuscuta, Loranthus and santalum are stem parasites. Nepenthes, Drosera and Dionaea are the insectivorous plants. Mangrove plants are seen in saline marshy lands. 

So, the correct answer is option A.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

A mutant micro-organism unable to synthesize a compound required for its growth, but able to grow if the compound is provided, is known as

  1. Auxotroph

  2. Prototroph

  3. Autotroph

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
An auxotroph is a mutant microorganism that requires some nutrient that is not normally required by the organism (prototroph) from which the mutant was derived. 
A microorganism that has the ability to synthesize all of its amino acids, nucleic acids, vitamins, and other cellular constituents from inorganic nutrients is known as prototroph.  
Autotrophs are those organisms that are able to make energy-containing organic molecules from inorganic raw material by using basic energy sources such as sunlight. 
Thus, the correct answer is option A.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

The enzyme commonly presents in insectivorous plants to fulfil the need of their specific habit

  1. Trypsin

  2. Pepsin

  3. Pectinase

  4. Cellulase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Trypsin is working as a digestive enzyme to break down proteins in the small intestine.
  • Some plants eat insects. Such plants are called insectivorous plants. They trap and digest insects. The insect is then digested by the enzyme pepsin secreted by the cells of the plants. Example -The protease secreted in the pitcher fluid is pepsin-like.
  • Pectinase is the enzyme that breaks down pectin and polysaccharides found in plant cell walls.
  • Cellulase is the enzyme that converts cellulose into glucose or a disaccharide.

So option B is correct.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

A carnivorous plant similar to Utricularia in being rootless, aquatic, and resembling Venus Fly Trap in catching mechanism is

  1. Aldrovanda

  2. Pinguicula

  3. Drosera

  4. Sarracenia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aldrovanda is an insectivorous plant as it feeds on insects. Aldrovanda vesiculosa, commonly known as the waterwheel plant, captures small aquatic invertebrates using traps similar to those of the Venus flytrap. The traps are arranged in whorls around a central, free-floating stem.

So, the correct answer is 'Aldrovanda'.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

The pertinacious substance involved in saprophytic incompatibility and stored in the exile is derived from ____________.

  1. Tapetum

  2. Microspore

  3. Anther locule

  4. Stigmatic papillae
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In flowering plants, the tapetum is the innermost layer of the anther wall that provides nutrients to developing microspores and contributes substances to the pollen wall, including those involved in self-incompatibility.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

Which one of the following does NOT apply to saprophytic self-incompatibility systems?

  1. $3$-celled pollen

  2. Dry stigma

  3. Rejection reaction in the style

  4. In vitro pollen germination is difficult
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sporophytic self-incompatibility is typically associated with 2-celled pollen at the time of shedding. 3-celled pollen is characteristic of gametophytic self-incompatibility systems.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

Which symbiotic relationship is NOT observed between Rhodium species and plants modulated?

  1. R. Meliloti: Trigonella foenumgracum

  2. R. Leguminosarum: Lens esculenta

  3. R. Japonicum: Glycine max

  4. R. Lupini: Cajanus cajan
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pairing R. Meliloti with Trigonella foenum-graecum is incorrect because R. meliloti typically nodulates Medicago, Melilotus, and Trigonella, but the specific pairing listed here is often cited as a mismatch in specific textbook contexts regarding host specificity.