CBSE Class 7 Science Advanced Biology Basis of Classification Very Short Answer Questions Set 01

Very Short Answer Questions

Question 1. Fill in the blank: Five-kingdom classification was proposed by _______.
Answer:
R.H. Whittaker
In simple words: Whittaker is the scientist of the five kingdoms.

Teacher's Note:
1. He grouped organisms using cell type, body organization and nutrition.
2. Do not mix him with Linnaeus, who gave two kingdoms.

Question 2. Fill in the blank: _______ is an example of unicellular organism.
Answer:
Bacteria (Amoeba and yeast are other examples).
In simple words: Bacteria have a body of only one cell.

Teacher's Note:
1. Any single-celled organism is acceptable.
2. The answer key of the book gives bacteria.

Question 3. Fill in the blank: Organisms that produce their own food are called _______.
Answer:
Autotrophs
In simple words: Autotrophs, such as green plants, make their own food.

Teacher's Note:
1. Auto means self and troph means nutrition.
2. Plants do this by photosynthesis.

Question 4. Fill in the blank: Amoeba comes under the kingdom _______.
Answer:
Protista
In simple words: Amoeba is a single-celled eukaryote, so it is a protist.

Teacher's Note:
1. Amoeba has a true nucleus, so it is not in Monera.
2. Paramoecium is another protist.

Question 5. Fill in the blank: Organisms that feed on dead and decaying matter are _______.
Answer:
Saprophytes
In simple words: They live on dead and rotting material.

Teacher's Note:
1. Mushrooms and bread mould are saprophytes.
2. Parasites, in contrast, feed on living hosts.

Question 6. Fill in the blank: Unicellular eukaryotes come under the kingdom _______.
Answer:
Protista
In simple words: Single cell plus true nucleus means Protista.

Teacher's Note:
1. Yeast is a unicellular eukaryote too, but it is placed in Fungi.
2. Use the nutrition mode to separate yeast from protists.

Question 7. Fill in the blank: Genus name starts with _______ letter.
Answer:
Capital (for example, Homo).
In simple words: The first word of a scientific name begins with a big letter.

Teacher's Note:
1. The species name begins with a small letter.
2. Together they form the binomial name.

Question 8. Fill in the blank: _______ is the highest level of classification.
Answer:
Kingdom
In simple words: Kingdom is the biggest group; species is the smallest.

Teacher's Note:
1. Order of levels: species, genus, family, order, class, phylum, kingdom.
2. Remember it from the bottom upward.

Question 9. Fill in the blank: Human belongs to the class _______.
Answer:
Mammalia
In simple words: Humans are mammals.

Teacher's Note:
1. Mammals feed their young with milk.
2. Lions and tigers are in the same class.

Question 10. Fill in the blank: Fish are included in the class _______.
Answer:
Pisces
In simple words: Pisces is the class of fishes.

Teacher's Note:
1. Fishes live in water and breathe through gills.
2. Fish, birds, reptiles and humans are all in phylum Chordata.

Question 11. Define binomial nomenclature.
Answer:
Binomial nomenclature is the system of naming an organism with a two-part scientific name: the genus name followed by the species name.
For example, the scientific name of humans is Homo sapiens, where Homo is the genus and sapiens is the species.
In simple words: Every organism gets a first name (genus) and a second name (species).

Teacher's Note:
1. Write one example in the answer.
2. Linnaeus introduced this system.

Question 12. Which is the lowest level of classification? Give one example.
Answer:
Species is the lowest level of classification. It contains organisms that are alike in their characters and can breed among themselves.
Example: all domestic cats belong to the species catus; humans belong to the species sapiens.
In simple words: A species is one kind of organism that can interbreed.

Teacher's Note:
1. The ability to interbreed is the key idea.
2. Species is the base of the hierarchy and kingdom is its top.

Question 13. Who proposed the two-kingdom classification? What was its basis?
Answer:
Linnaeus proposed the two-kingdom classification and divided living organisms into Animalia and Plantae.
The basis was the mode of nutrition (how they get food) and the ability to move.
In simple words: Plants make food and stay fixed; animals eat food and move.

Teacher's Note:
1. Two kingdoms: Plantae and Animalia.
2. This system was later replaced by the five-kingdom system.

Question 14. Complete the flowchart with the missing words.

Answer:
(A) Eukaryotes
(B) Monera
(C) Protista
(D) Autotrophs
(E) Fungi
Reading the chart: prokaryotes are unicellular and form Monera. Eukaryotes are unicellular (Protista) or multicellular. Multicellular autotrophs form Plantae; multicellular heterotrophs form Fungi and Animalia.
In simple words: Follow the branches: cell type, then number of cells, then nutrition.

Teacher's Note:
1. Use the five-kingdom table to check each blank.
2. Compare your answer with the completed chart in the notes.

Question 15. While writing the scientific name of humans, a student wrote homo Sapiens. Is this way of writing the scientific name correct?
Answer:
No, it is incorrect. The genus name must start with a capital letter and the species name with a small letter.
The correct form is Homo sapiens (underlined separately when handwritten, italics when typed).
In simple words: First word capital, second word small.

Teacher's Note:
1. Two common mistakes are small genus letter and capital species letter.
2. Italics or underlining is also required.