Tag: systematics of living world

Questions Related to systematics of living world

The system of classification of plants proposed by these two botanists is claimed to be a natural system.

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

  1. Engler and Prantl

  2. Bentham and Hooker

  3. Aristotle and Theophrastus

  4. Darwin and Wallace

Show answer
Correct Option: B
Explanation:

George Bentham and Joseph Dalton Hooker are the British botanists. They proposed the classification system based on the natural system. This system includes the characters of the plants which exist in the natural conditions. The plants are classified based on their relative affinities.

Thus, the correct answer is option B.

In some flowering plants, the requirement of long day length or low temperature treatment for flowering can be effectively substituted by _______________.

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

  1. Morphactins

  2. Coumarins

  3. $2, 4$-D

  4. Gibberllins

Show answer
Correct Option: A

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

  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-$4$

Show answer
Correct Option: A

Select an incorrect match.

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

  1. Whorled phyllotaxy - Alstonia, Nerium

  2. Decussate phyllotaxy - Quisqualis, Psidium, Syzygium

  3. Alternate phyllotaxy - Mustard, China rose, Sunflower

  4. Opposite phyllotaxy - Zinnia, Calotropis

Show answer
Correct Option: A

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

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

  1. Nymphaeaccae

  2. Apocynasceae

  3. Boraginaceae

  4. Liliaceae

Show answer
Correct Option: A

Gynobasic style is characteristic feature of the family ____________.

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

  1. Rosaceae

  2. Orchidaceae

  3. Labiatae

  4. Cucurbitaceae

Show answer
Correct Option: A

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

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

  1. $\cfrac{4}{16}$

  2. $\cfrac{3}{16}$

  3. $\cfrac{2}{16}$

  4. $\cfrac{1}{16}$

Show answer
Correct Option: D
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'




Morphine is extracted from the latex of plant?

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

  1. Erythroxylum coca

  2. Cannabis sativa

  3. Papaver somniferum

  4. Atrope balladona

Show answer
Correct Option: C
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’. 

Phylogenetic system of classification is based on:
 

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

  1. Floral characters

  2. Evolutionary relationships

  3. Morphological features

  4. Chemical constituents

Show answer
Correct Option: B
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. 

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

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

  1. Artificial

  2. Natural

  3. Phylogenetic

  4. Sexual

Show answer
Correct Option: B
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'.