Tag: biodiversity and need of classification

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

The organelles found in 4 different types of cells are shown in the table below. Use the information in the table to answer the next 3 questions.
Cell Types and Their Characteristics

Cell Type Nucleus Mitochondria Cell Wall  Cell Membrane Chloroplast
1234 yesyesyes no yesyesyesno noyesyesyes yesyesyesyes noyes nono

Which cell type is prokaryotic?

  1. Cell 1 and 2 only

  2. Cell 3 only

  3. Cell 4 only

  4. Cell 2 and 3 only

  5. Cell 3 and 4 only
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A prokaryotic cell doesn't have well defined nucleus and membrane bound cell organelles but cell wall and cell membrane are present.
From the information given in the question, it is clear that cell 4 doesn't have a nucleus and the membrane bound cell organelles, mitochondria and chloroplast but it has cell wall and cell membrane.
So, the correct answer is 'Cell 4 only'.
Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Ray fungi are

  1. Phycomycetes

  2. Ascomycetes

  3. Actinomycetes

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

Ray fungi are also called as Actinomycetes. They form a mycelium consisting of narrow hyphae. They show characteristics of both fungi and bacteria. They form the normal part of the mouth flora in the human. They produce many antibiotics like streptomycin, actinomycin and chloromycin. 

Thus, the correct answer is 'Actinomycetes.'

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

Which of the following differentiates gram positive and gram negative bacteria?

  1. A liposaccharide, outer covering with a small peptidoglycan component in the cell wall

  2. A small peptidoglycan, component covering a large liposaccharide base

  3. A large peptidoglycan, component in the cell wall

  4. A cell wall composed of liposaccharide and chitin

  5. A cell wall composed of chitin over peptidoglycan
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The gram-negative cell wall is characterized by presence of outer membrane, a thinner peptidoglycan layer and extensive periplasmic space surrounding the peptidoglycan. The uppermost layer of the outer membrane has lipopolysaccharide while the innermost layer is a typical lipid layer. Gram positive cells are characterized by presence of single thick layer of cell wall which is made up of peptidogycan, teichoic acid and lipoteichoic acid. They lack outer membrane and porin and have narrow periplasmic space. Correct answer is C.

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

All autotrophs are monerans.

  1. True

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

  • Monera is a kingdom that contains unicellular organisms with a prokaryotic cell organization such as a bacteria.
  • Moneran has heterogenicity in the mode of nutrition.
  • They are single-celled organisms with no true nuclear membrane 
  • The taxon Monera was first proposed as a phylum by Ernest Haeckel in 1866.
  • Autotrophs are the organism which prepares their own food. plants are autotrophs but belongs to Plantae.
So, the correct option is 'False'.

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

All monerans ___________________.

  1. Contain $DNA$ and $RNA$
  2. Demonstrate a long circular strand of $DNA$, not formed enclosed in a nuclear membrane

  3. Are bacteria

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Monerans are prokaryotes, meaning they lack a membrane-bound nucleus (they have a nucleoid with circular DNA). They are not exclusively bacteria (they include archaea), but the options provided are often grouped in general biology contexts.

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

Choose the correct answers from the alternatives given.
In Whittaker system of classification, all prokaryotes were included In the kingdom:

  1. Monera

  2. Protista

  3. Fungi

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

In the five-kingdom classification system proposed by R.H. Whittaker, all prokaryotic organisms are grouped into the kingdom Monera.