The Invisible Living World Beyond Our Naked Eye Class 8 Fill in the Blanks
hardThe Invisible Living World Beyond Our Naked Eye Class 8 Fill in the Blanks
The Invisible Living World Beyond Our Naked Eye Class 8 Fill in the Blanks
Question 1.
The basic unit of life is called a .............
Answer:
cell
Question 2.
A group of similar cells that work together to perform a specific function is known as a .............
Answer:
tissue
Question 3.
............are microorganisms that can be found in the roots of pulse crops, helping them to absorb nitrogen from the soil.
Answer:
Rhizobium
Question 4.
The process by which bacteria like Lactobacillus ferment milk to produce curd is known as .............
Answer:
fermentation
Question 5.
The levels of organisation in a living organism, starting from the smallest unit to the whole organism, are: cell, ............, organ, organ system, and organism.
Answer:
tissue
The Invisible Living World Beyond Our Naked Eye Class 8 True or False
Question 1.
Microorganisms such as Rhizobium can help legumes grow better without the need for chemical fertilisers.
Answer:
True
Question 2.
Yeast is a type of bacteria that is responsible for making bread rise.
Answer:
False
Question 3.
Microalgae are important for the environment because they produce more than half of the Earth's oxygen supply.
Answer:
True
Question 4.
Curd becomes sour due to the action of yeast fermenting the milk.
Answer:
False
Question 5.
Microorganisms can only thrive in warm and moist environments.
Answer:
False
The Invisible Living World Beyond Our Naked Eye Class 8 Match the Following
Question 1.
Match the microorganisms in Column A with their functions in Column B.
| Column A (Microorganism) | Column B (Function) |
| A. Lactobacillus | 1. Nitrogen fixation in legumes |
| B. Yeast | 2. Used in curd formation |
| C. Rhizobium | 3. Fermentation in bread and alcoholic drinks |
| D. Decomposers | 4. Decompose organic matter |
Answer:
| Column A (Microorganism) | Column B (Function) |
| A. Lactobacillus | 2. Used in curd formation |
| B. Yeast | 3. Fermentation in bread and alcoholic drinks |
| C. Rhizobium | 1. Nitrogen fixation in legumes |
| D. Decomposers | 4. Decompose organic matter |
Question 2.
Match the tools in Column A with their uses in Column B.
| Column A (Tool) | Column B (Use) |
| A. Magnifying Glass | 1. Observing tiny organisms |
| B. Microscope | 2. Making small objects appear larger |
| C. Foldscope | 3. Low-cost alternative for microscopic study |
| D. Round-bottom flask | 4. Acts as a simple magnifying tool |
Answer:
| Column A (Tool) | Column B (Use) |
| A. Magnifying Glass | 2. Making small objects appear larger |
| B. Microscope | 1. Observing tiny organisms |
| C. Foldscope | 3. Low-cost alternative for microscopic study |
| D. Round-bottom flask | 4. Acts as a simple magnifying tool |