Tag: biodiversity and need of classification

Quizzes (0) Questions (106)

Questions Related to biodiversity and need of classification

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Which one of the following statements is correct?

  1. Mostly bacteria are heterotrophic, but some are autotrophic

  2. All bacteria are heterotrophic

  3. All bacteria are autotrophic

  4. All bacteria are photosynthetic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Most bacteria are heterotrophic, however, a special class of bacteria called cyanobacteria or BGA are autotrophic, that is they can produce there own food. So, the correct option is A. ( Mostly bacteria are heterotrophic, but some are autotrophic )

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Organisms which are considered to be the most primitive group in the world are grouped under

  1. Kingdom Monera

  2. Kingdom Protista

  3. Kingdom Fungi

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

According to the "Five kingdom system of classification" proposed by R. H. Whittaker in 1969, all living organisms are classified under 5 kingdoms. The names and characteristics are explained below.

  1. Kingdom Monera:  Contains unicellular, prokaryotic, organisms like bacterial species. These are the most primitive organisms with no defined or true nucleus and no membrane-bound organelles. 
  2. Kingdom Protista: Contains eukaryotic unicellular organisms like Amoeba. They have true membrane-bound organelles and nucleus.
  3. Kingdom Fungi: Eukaryotic multicellular (exception: yeast is unicellular) non-photosynthetic organisms
  4. Kingdom Plantae:  Eukaryotic multicellular photosynthetic autotrophic organisms
  5. Kingdom Animalia: Eukaryotic multicellular heterotrophic organisms.
Here, only Kingdom Monera is consists of prokaryotic organisms and thus it is considered the most primitive group.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Which kingdon included nutritioally most diversed group of organisms and has no well defined boundaries?

  1. Monera

  2. Protist

  3. Fungi

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

Kingdom Monera contains bacteria, which exhibit the most diverse metabolic strategies (autotrophic, heterotrophic, chemoautotrophic) and lack a defined nuclear membrane, making their boundaries less distinct compared to other kingdoms.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Select correct statement w.r.t. Monera

  1. All unicellular and Gram negative

  2. Very simple in behaviour

  3. Show the most extensive metabolic diversity

  4. Show intercellular transport by cyclosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The kingdom Monera includes all prokaryotes, which may be gram positive or gram negative bacteria. They have a simple structure but are complex in behaviour. Intercellular transport by cyclosis is seen only in eukaryotes and hence is not found in monera. They have an extensive metabolic diversity and their mode of nutrition may be heterotrophic or autotrophic. 

So, the correct option is 'Show the most extensive metabolic diversity'.

Multiple choice biology classification of plants monera five kingdoms of living organisms biodiversity and need of classification

Starting with a bacterium that divides once in half hour, how many bacteria are formed after $24$ hours of growth?

  1. $2^{12}$
  2. $2^{24}$
  3. $2^{48}$
  4. $2^{47}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Since the bacteria divides once in half hour. In one hour number of times it will divide = 2

So, in 24 hours number of times the bacteria will divide = 2*24= 48 times
So, number of bacteria formed after 24 hours = 2$^4$$^8$ 
So, the correct answer is '2$^4$$^8$'.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Which of the following is correct?

  1. Bacteria are only autotrophic.

  2. Bacteria are only heterotrophic.

  3. Most bacteria are heterotrophic but few are autotrophic.

  4. Most bacteria are autotrophic but few are heterotrophic.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The bacteria are the prokaryotic organisms which are generally heterotrophic. These bacteria feed on the dead and digested matter. There are certain species of bacterium which is inclusive of the cyanobacteria. These are the blue-green algae which can perform photosynthesis due to the presence of the chlorophyll pigments. The other bacterial species can perform chemosynthesis and can utilise the organic and inorganic compounds as the source of energy. 

Thus, the correct answer is option C. 

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Monera is divided into archaebacteria and eubacteria.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Monera is a kingdom that contains unicellular organisms with a prokaryotic cell organization (having no nuclear membrane), such as bacteria. Until recently, all bacteria were grouped together in one kingdom (five-kingdom system). 
  • The five-kingdom system is divided into animals, plants, fungi, protists, and monera. The Monera kingdom is made up of two phyla, or groups. They are archaebacteria and eubacteria.
So, the correct answer is 'True'.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Bacteria were considered as plant because

  1. They have a cell wall.

  2. They multiply by fission.

  3. They can't move.

  4. They are present every where.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The plant cell possesses a cell wall which is composed of cellulose, pectin and lignin. The cell wall provides mechanical strength and protection to the internal cellular organelles. The bacterial cell also possesses a cell wall which is made up of peptidoglycan. Due to the presence of the cell wall, the bacteria were also considered similar to the plant cell. 

Thus, the correct answer is option A.