Question 1:
Use Whittakar method to classify bacteria, protozoa, fungi, algae, prokaryotic and eukaryaotic microbes.
Answer
Robert Whittaker classified living organisms into five groups – Monera, Protista, Fungi, Plantae and Animalia.
- According to this classification, bacteria and blue green algae are included in kingdom Monera.
- Unicellular eukaryotes i.e. protozoans, protozoa are included in kingdom Protista.
- Heterotrophic fungi are separated from autotrophic plants due to the presence of chitinous cell wall and are included in kingdom Fungi.
- Prokaryotic microbes like bacteria are included in kingdom Monera.
- Eukaryotic microbes like protozoa, fungi and algae are included in kingdom Protista, Fungi and Plantae
Question 2:
Complete the five kingdom method of classification using living organism prokaryotes, eukaryotes, multicellular, unicellular, protista, animals, plants, fungi.
Question 3:
Find out my partner
| A |
B |
| Fungi |
Chlorella |
| Protozoa |
Bacteriophage |
| Virus |
Candida |
| Algae |
Amoeba |
| Bacteria |
Prokaryotic |
Answer
| A |
B |
| Fungi |
Candida |
| Protozoa |
Amoeba |
| Virus |
Bacteriophage |
| Algae |
Chlorella |
| Bacteria |
Prokaryotic |
Question 4:
State whether the following statements are true or false. Explain your statement.
A. Lactobacilli are harmful bacteria.
Answer
Lactobacilli are harmful bacteria.- False
Lactobacilli are not harmful bacteria, infact they are found in gastrointestinal tracts of animals and humans. They are also an important part of dairy products such as milk, yogurt etc.
B. Cell wall of fungi is made up of chitin.
Answer
Cell wall of fungi is made up of chitin.- True
C. Organ of locomotion in amoeba is pseudopodia.
Answer
Organ of locomotion in amoeba is pseudopodia.- True
E. Tomato wilt is viral disease.
Answer
Tomato wilt is viral disease.- True
Question 5:
Give answers.
A. State the merits of whitetaker's method of classification.
Answer
The merits of Whitakker’s method of classification are:
- Unicellular and multicellular organisms are kept under separate categories.
- Autotrophs and heterotrophs are placed in separate groups.
- A separate kingdom was assigned to fungi because of its mode of nutrition.
- It is more natural than two kingdom classification.
Prokaryotes are placed under a separate category of monera.
B. Write the characteristics of viruses.
Answer
The various characteristics of viruses are:
- They are smaller and simpler than bacteria. Size of viruses ranges from approximately 10nm to 100nm.
- They can be seen only with an electron microscope. Viruses are 10 to 100 times smaller than bacteria.
- They are considered to be on the boundary line of living and non-living things.
- They are obligate parasites and cannot live on their own.
- They cannot multiply on their own. They require living machinery to multiply.
- Viruses consist of genetic materials (DNA or RNA) surrounded by a protective coat of protein (capsid).
- Viruses are responsible for causing many dreadful diseases in plants, animals, and humans.
C. Explain the nutrition in fungi.
Answer
The mode of nutrition in fungi is saprotropic and they are called saprophytes. It is a mode of nutrition in which an organism obtains its nutrients from the decaying organic matter.
D. Which living organisms are included in the kingdom monera ?
Answer
Organisms with following characteristics are inlcuded under the kingdom monera:
- Absence of nucleus and membrane-bound organelles
- Presence or absence of cell wall
- Can be either autotrophic or heterotrophic
- Are all unicellular and include mainly bacteria and blue green algae
Examples include bacteria and blue green algae.
Question 6:
Who am I ?
A. I don't have true nucleus, cell organelles or plasma membrance.
B. I have nucleus and membrane bound cell orgenelles.
C. I live on decaying organic matter.
D. I reproduce mainly by cell division.
E. I Can produce my replica.
F. I am green, but don't have organs.
Answer
A. I don’t have true nucleus, cell organelles or plasma membrance. – Monera
B. I have nucleus and membrane bound cell orgenelles. – Protozoa
C. I live on decaying organic matter. – Fungi
D. I reproduce mainly by cell division.- Bacteria
E. I Can produce my replica. – Viruses
F. I am green, but don’t have organs. – Algae
Question 7:
Draw neat and labelled diagrams.
A. Different types of bacteria.
B. Paramoecium
C. Bacteriophage.
Question 8:
Arrange the follwing in ascending order of size Bacteria, Fungi, Viruses, Algade.
Answer
Viruses →Bacteria →Fungi→Algae
