Common Misconceptions
6 min read

Biological Classification

- Clear the fog of misconceptions and get a clarity of concepts
1
Classification of Animals
We often get confused about a concept that we classify animals on the basis of physical appearance. If the body possess hair then it is a mammal, if it has hyphae then it is a fungus, if it is unicellular and moves using pseudopodia then it is amoeba. But, wait! Classification is not only about morphological differences. It also includes differences at the molecular and genetic level too. The six kingdom classification emerged because of the differences in the molecular level.
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Archaebacteria differ from eubacteria in which one of the following respect?
A
Their cell wall lack peptidoglycan compound
B
They inhabit extreme environment
C
They have unique 16s RNA
D
All of the above
2
Domain and Kingdom
Are the categories 'Domain' and 'Kingdom' the same? Well, the answer is no. Kingdom comes under domain.
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3
Mushroom: Is it a Plant or a Fungus?
Do you guys love chilly mushroom? Well, to find this dish, you go to the 'veg' section of the menu card, right? Does that mean mushroom is a plant? No, not all! Mushroom is not a plant but a fungus. But aren't fungi microscopic? Not all fungi are microscopic; mushroom is an exception! Go through the illustration below and then attempt the given question to clear the confusion.
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4
Archaea
The name of group Archaebacteria tells us that they are bacteria. But no, that is not true. Archaebacteria have an independent evolutionary history and have many differences from bacteria in terms of their biochemistry according to six kingdom classification. According to recent researches, Archaebacteria are found to be more closely related to the domain Eukarya than to the domain Bacteria. Eubacteria under monerans are now domain bacteria in six kingdom classification. Have a look at the illustration below and then solve the given question for more clarity.
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The division of the living world into three domains:
A
Is strictly arbitrary.
B
Was inspired by the morphological differences between archaea and bacteria.
C
Emphasizes the greater importance of eukaryotes and was proposed by the early microscopists.
D
Is strongly supported by data on rRNA sequences.
5
Are Bacteria Autotrophic or Heterotrophic?
What comes to your mind when you hear the word 'autotrophs'? We always imagine a plant, right? But, few bacteria also perform photosynthesis. For example, cyanobacteria.
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Which of the following statements is correct?
A
All bacteria are heterotrophic
B
All bacteria are chemoautotrophic
C
All bacteria are photoautotrophic
D
Some bacteria are photoautotrophic
6
Kingdom Animalia
The Kingdom Animalia only has organisms that are vertebrates. Is this true? No. We often think kingdom Animalia contains vertebrates like mammals, reptiles or birds, but, Kingdom Animalia also contain invertebrates.
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