Biological Classification - Online Test
Q1. A distinction between unicellular and multicellular is not possible in
Answer : Option B
Explaination / Solution:
Algae grouped together the unicellular organisms and the multicellular ones.
Q2. Which among the following is not included in the three domains system?
Answer : Option A
Explaination / Solution:
The three domain system includes Archaebacteria, Eubacteria and Bacteria domain.
Q3. Which archaebacteria is present in the guts of ruminant animals such as cows and buffaloes?
Answer : Option D
Explaination / Solution:
Methanogens are present in the guts of several ruminant animals such as cows and buffaloes and they are responsible for the production of methane (biogas) from the dung of these animals.
Q4. The blue-green algae are also referred as
Answer : Option D
Explaination / Solution:
Blue green algae are also called as cyanobacteria. They are considered as most primitive organism that still survives. It includes different forms of unicellular and multicellular organisms.
Q5. The organism that completely lack a cell wall and are smallest living cell known that can survive without oxygen is
Answer : Option A
Explaination / Solution:
Mycoplasma is a genus of bacteria that lack a cell wall around their cell membrane. Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.
Mycoplasma species are the smallest bacterial cells yet discovered,can survive without oxygen, and come in various shapes. For example, M. genitalium is flask-shaped.
Q6. Which one is not a member of kingdom Protista?
Answer : Option C
Explaination / Solution:
Kingdom Protista includes unicellular, eukaryotic organisms only. Phycomycetes is a subdivision of fungus which are multicellular. Protozoa, slime molds and euglenoids are part of kingdom Protista.
Q7. The class of fungi in which mushroom is included is
Answer : Option C
Explaination / Solution:
Commonly known forms of basidiomycetes are mushrooms, bracket fungi or puffballs.
Q8. Diatoms do not decay easily because
Answer : Option D
Explaination / Solution:
The walls of the diatoms are embedded with silica and thus the walls are indestructible.
Q9. In fungi like ascomycetes and basidiomycetes, an intervening dikaryotic stage occur. Such condition is called
Answer : Option C
Explaination / Solution:
In fungi like ascomycetes and basidiomycetes, an intervening dikaryotic stage (n + n i.e. two nuclei per cell) occurs; such a condition is called a dikaryon and the phase is called dikaryo phase of fungus.
Q10. The body of fungus is filamentous and it is called
Answer : Option B
Explaination / Solution:
The body of filamentous fungus is known as mycelium, which is a thread like structure. Mycelium produces hyphae and sporegenous cells to produce spores.
