Tag: classification of biodiversity

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Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

Match List-I with List-II and select the correct answer.

List-I List-II
a. Aborescent lycopod $1$. Rafflesia
b. Largest flower $2$. Lepidodendron
c. Largest ovule $3$. Cycas
d. Tallest tree $4$. Sequoia
  1. A-$1$, B-$2$, C-$4$, D-$3$
  2. A-$1$, B-$2$, C-$3$, D-$4$
  3. A-$2$, B-$1$, C-$4$, D-$3$
  4. A-$2$, B-$1$, C-$3$, D-$4$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aborescent lycopods are represented by fossil plants like Lepidodendron (a-2). The largest flower is Rafflesia arnoldii (b-1). The largest ovule is found in Cycas (c-3). The tallest tree is the redwood, Sequoia (d-4). Matching these gives A-2, B-1, C-3, and D-4.

Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

Gynobasic style is the characteristic feature of the family Labiates but it is also found in several members of.

  1. Nymphaeaccae

  2. Apocynasceae

  3. Boraginaceae

  4. Liliaceae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A gynobasic style, where the style arises from the base of the ovary among the lobes, is a diagnostic feature of the family Labiates (Lamiaceae) and is also prominently found in several members of the Boraginaceae family. Both families share this unique carpellary arrangement.

Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

Gynobasic style is characteristic feature of the family ____________.

  1. Rosaceae

  2. Orchidaceae

  3. Labiatae

  4. Cucurbitaceae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A gynobasic style is characterized by the style arising from the base of the four-lobed ovary, nestled between the lobes rather than from its apex. This is a classic and diagnostic morphological feature of the family Labiatae, also known as Lamiaceae (the mint family).

Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

In Lathyrus odoratus, if double heterozygous purple-flowered plants are crossed then what would be the probability of double homozygous white-flowered plants?

  1. $\cfrac{4}{16}$
  2. $\cfrac{3}{16}$
  3. $\cfrac{2}{16}$
  4. $\cfrac{1}{16}$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
According to the dihybrid, if the double heterozygous plants are crossed then the gametes formed will be- AB, ab, Ab, aB. The genotype of the double homozygous white flowering plant will be aabb because white is the recessive gene. The probability will be 1/16 according to the dihybrid cross ratio.

   Ab  AB  aB ab
 Ab  AAbb  AABb  AaBb  Aabb
 AB  AABb  AABB  AaBB  AaBb
 aB  aABb  AaBB  aaBB  aaBb
 ab  aAbb  aABb  aaBb  aabb

So, the correct option is '1/16'




Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

Morphine is extracted from the latex of plant?

  1. Erythroxylum coca

  2. Cannabis sativa

  3. Papaver somniferum

  4. Atrope balladona
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An analgesic and narcotic drug obtained from opium and used medicinally to relieve pain. It is obtained from the latex of dried seed pods of Papaver somniferum belongs to the family Papaveraceae.

So, the correct option is ‘Papaver somniferum’. 

Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

Phylogenetic system of classification is based on:
 

  1. Floral characters

  2. Evolutionary relationships

  3. Morphological features

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

A classification that is based on biochemical properties are termed as chemotaxonomy.

And the classification based on quantitative assessment of similarities and differences between the organisms are known as phenetic classification.

Classification based on cytological characteristics of organisms is known as cytotaxonomy. Also, phylogenetic classification is based on the evolutionary ancestry.

So the correct option is B. 

Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

________ systems of classification were based on natural affinities among the organisms.

  1. Artificial

  2. Natural

  3. Phylogenetic

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

Natural system of classification takes into consideration comparable study of number of characters so as to bring out natural similarities and dissimilarities and hence natural relationships among the organisms. They include morphological characters, anatomical characters, cytological characters, physiology, ontogeny or development, reproduction, cytochemistry and biochemistry, experimental taxonomy, etc. So, the correct answer is 'Natural'.

Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

Phylogenetic system of classification is proposed by

  1. John Hutchinson

  2. Carolus Linnaeus

  3. George Bentham

  4. Engler and Prantl
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Initially, the Phylogenetic system was proposed by Engler and Prantl. In their treatise 'Die Naturlichen Pflanzen Familien', they arranged the flowering plants according to the increasing complexity of their floral morphology. 
  • John Hutchinson was a British botanist associated with Royal botanic gardens, Kew, England.  His phylogenetic system first appeared as  "The Families of Flowering plants " in two volumes. 
  • Carolus Linnaeus was a Swedish botanist who formalized binomial nomenclature, the modern system of naming organisms. He is known as  The Father of Taxonomy. 
  • George Bentham was an English botanist whose classification of seed plants (Spermatophyta), based on an exhaustive study of all known species, served as a foundation for modern systems of vascular plant taxonomy.
So the correct option is 'Engler and Prantl'.

Multiple choice botany taxonomy and systematic botany taxonomy and systematics systematics of living world kingdom plantae plant taxonomy classification of biodiversity

In flowering plants, meiosis takes place during?

  1. Pollen grain formation

  2. Seed formation

  3. Gamete formation

  4. Seed germination
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Meiosis occurs during the formation of gametes (gametogenesis) in the life cycle of flowering plants to reduce the chromosome number from diploid to haploid.