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

In flowering plants archesporium gives rise to.

  1. Wall of sporangium

  2. Both wall and sporogenous cells

  3. Wall and tapetum

  4. Tapetum and sporogenous cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The archesporium in the sporangium divides to form the primary parietal cells (wall) and the primary sporogenous cells (which produce spores).

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

A flower with over one thousand stamens is?

  1. Bignonia

  2. Bombax

  3. Cannabis

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

Adansonia, commonly known as the baobab tree, produces large flowers characterized by an exceptionally high number of stamens, often exceeding one thousand. This massive number of stamens helps ensure pollination by various nocturnal animals and insects. The other listed genera do not exhibit this specific extreme polyandrous trait to this extent.

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

A mutant strain of Neurospora which fails to grow on a minimal medium unless supplemented with a nutrient is called

  1. Auxotroph

  2. Autotroph

  3. Heterotroph

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

An auxotroph is a mutant organism that requires a specific nutrient for growth that the wild-type strain can synthesize on its own.

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

In evolutionary history, in which one of the following periods did the flowering plants make their first appearance?

  1. Certaceous of Mesozoic era

  2. Pleocene of cenopzic era

  3. Devonian of Paleozoic

  4. Permian of Paleozoic era
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Angiosperms first appeared in the Early Cretaceous Period of the Mesozoic Era. Fossil records from approximately 130-140 million years ago show the earliest definitive flowering plant evidence.

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

Salicornia is an example of ____________.

  1. Epiphyte

  2. Halophyte

  3. Mesophyte

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

Salicornia is a genus of succulent, salt-tolerant flowering plants that grow in salt marshes, mud flats, and along seashores, making them classic examples of halophytes. Halophytes are adapted to thrive in high-salinity environments by employing various physiological mechanisms to handle osmotic stress. They are neither epiphytes, parasites, nor standard mesophytes.

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

Match List-I(Plant by-products) with List-II(Examples of compounds) and select the correct answer.

List-I List-II
a. Alkaloid $1$. Anthocyanin
b. Flavonoid $2$. Natural rubber
c. Terpenoid $3$. Folic acid
d. Vitamin $4$. Ephedrin
  1. A-$4$, B-$1$, C-$2$, D-$3$
  2. A-$3$, B-$2$, C-$1$, D-$4$
  3. A-$4$, B-$2$, C-$1$, D-$3$
  4. A-$3$, B-$1$, C-$2$, D-$4$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alkaloids include compounds like Ephedrin (A-4), Flavonoids include Anthocyanin (B-1), Terpenoids include Natural rubber (C-2), and Vitamins include Folic acid (D-3).

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

Consider the following statements.
a. In climacteric fruits, ethylene stimulates its own production.
b. Gibberellin present in a healthy stem causes some of the new cells to differentiate as phloem.
c. Loss of turgor in leaves stimulates the production of abscises acid.
Which of the statements given are correct?

  1. $1$ and $2$ only
  2. $2$ and $3$ only
  3. $1$ and $3$ only
  4. $1, 2$ and $3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement a is correct because climacteric fruits exhibit a surge in respiration accompanied by autocatalytic ethylene production. Statement c is also correct because water stress and loss of turgor in leaves trigger the synthesis and accumulation of abscisic acid to close stomata. Statement b is incorrect because gibberellins do not cause cells to differentiate specifically into phloem.