Practicing Class 8 Science MCQ and Class 8 Science Chapter 2 The Invisible Living World: Beyond Our Naked Eye MCQ Questions Online Test with Answers daily helps in time management.
Class 8 The Invisible Living World: Beyond Our Naked Eye MCQ with Answers
MCQ on The Invisible Living World: Beyond Our Naked Eye Class 8
Class 8 Science Chapter 2 The Invisible Living World: Beyond Our Naked Eye MCQ Questions with Answers
Question 1.
Which of the following is used in the process of making bread, cakes, idlis and bhaturas?
(a) Protozoa
(b) Bacteria
(c) Yeast
(d) Both (b) and (c)
Answer:
(c) Yeast
Question 2.
Microorganisms are
(a) unicellular only
(b) multicellular only
(c) both unicellular and multicellular
(d) none of these
Answer:
(c) both unicellular and multicellular
Question 3.
Which of the following microorganisms are found in the root nodules of legumes?
(a) Lactobacillus
(b) Rhizobium
(c) Spirulina
(d) Chlorella
Answer:
(b) Rhizobium
Question 4.
Which one of the following microorganisms helps in curd formation?
(a) Rhizobium
(b) Salmonella
(c) Lactobacillus
(d) Spirulina
Answer:
(c) Lactobacillus
Question 5.
What common feature do Spirulina, Chlorella, and Diatoms share?
(a) All are fungi used in baking
(b) All are bacteria used in fermentation
(c) All are microalgae used in food and medicine
(d) All are viruses used in vaccines
Answer:
(c) All are microalgae used in food and medicine
The Invisible Living World: Beyond Our Naked Eye Class 8 Assertion-Reason Type Questions
Directions (Q. No. 1 to 5): The question below consists of an Assertion (A) and a Reason (R).
Use the following key to choose the appropriate answer.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false.
(d) A is false but R is true.
Question 1.
Assertion (A): Milk is turned into curd by bacteria.
Reason (R): Curd contains the Lactobacillus bacterium, which promotes the formation of curd.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
Question 2.
Assertion (A): The nerve cell is also known as neuron.
Reason (R): Muscle cells carry messages in our body.
Answer:
(c) A is true but R is false.
Question 3.
Assertion (A): The cell wall is present in animal cells.
Reason (R): The cell wall gives strength and rigidity to the plant cell.
Answer:
(d) A is false but R is true.
Question 4.
Assertion (A): The onion peel cell has a regular rectangular shape.
Reason (R): Onion cells have a cell wall that maintains their shape.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
Question 5.
Assertion (A): Foldscope is a low-cost microscope.
Reason (R): Foldscope is used mainly to view large animals in the wild.
Answer:
(c) A is true but R is false.
The Invisible Living World: Beyond Our Naked Eye Class 8 Fill in the blanks
Question 1.
The word lens comes from the shape of a ……….. seed.
Answer:
lentil
Question 2.
Spirulina is a type of ……….. used as a health supplement.
Answer:
microalgae
Question 3.
……….. is used in the curd formation at home.
Answer:
Lactobacillus
Question 4.
A ……….. is a legal right to protect an invention from being copied or used without permission.
Answer:
patent
Question 5.
……….. in ancient texts referred to both visible and invisible small entities.
Answer
Krimi
The Invisible Living World: Beyond Our Naked Eye Class 8 True or False
Question 1.
Methylene blue is used to stain cells for better visibility under a microscope.
Answer:
True
Question 2.
Bacteria have a well-defined nucleus surrounded by a membrane.
Answer:
False
Question 3.
Muscle cells are round and flat to help with movement.
Answer:
False
Question 4.
A group of similar cells forms a tissue.
Answer:
True
Question 5.
Plant cells do not have plastids.
Answer:
False
The Invisible Living World: Beyond Our Naked Eye Class 8 Match the following
Question 1.
Match the images given in Column A with their description given in Column B.
Answer:
(i)-(c), (ii)-(a), (iii)-(d), (iv)-(b)