Tag: taxonomy and systematic botany

Quizzes (16) Questions (144)

Questions Related to taxonomy and systematic botany

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

Which one of the following systems of plant classification is not phylogenetic?

  1. Bentham and Hooker's system

  2. Engler and Prantl's system

  3. Hutchinson's system

  4. Takhtajan's system
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bentham and Hooker's system of classification is based on morphological characters and is considered a natural system, not a phylogenetic one. Phylogenetic systems aim to reflect evolutionary relationships, which the others listed do.

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

Which one of the following clusters of families is identified due to the presence of the zygomorphic flowers and bicarpellary gynoecium's?

  1. Cuscutaceae, solanaceae, Verbenaceae

  2. Malvaceae, Tiliaceae, Cucurbitaceae

  3. Boraginaceae, Convolvulaceae, Solariaceae

  4. Acanthaceae, Fumariaceae, Lamiaceae
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acanthaceae, Fumariaceae, and Lamiaceae all consistently display zygomorphic (bilaterally symmetrical) flowers with bicarpellary (two-carpel) gynoecium. Other options contain families with actinomorphic flowers or different gynoecium arrangements.

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

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

  1. Engler and Prantl

  2. Bentham and Hooker

  3. Aristotle and Theophrastus

  4. Darwin and Wallace
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Morphactins

  2. Coumarins
  3. $2, 4$-D

  4. Gibberllins
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gibberellins are plant hormones that can successfully substitute for long-day photoperiod requirements or low-temperature cold treatments (vernalization) to induce flowering in various plant species. They help overcome these environmental triggers artificially. Other compounds like 2,4-D are synthetic auxins used mainly as herbicides.

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'