Afaq Sun Series (new) Science 5 - Unit-3 Our Body Microbes
- Micro-organisms are living organisms that cannot be seen with the naked eye and can only be seen under a microscope.
- Diseases are caused by harmful micro-organisms called germs.
- Micro-organisms are classified as viruses, bacteria, and fungi.
- Viruses are very tiny organisms not visible to the naked eye. They come in different shapes.
- Bacteria are unicellular organisms, having both harmful and beneficial effects.
- Fungi are multicellular organisms. Moulds and yeast are common examples of microscopic fungi, while mushrooms are examples of macroscopic fungi.
Questions / Answers (Exercise)
A. Answer the following questions.Q.1: Define micro-organisms.
Ans: Micro-organisms are living organisms that cannot be seen with the naked eye and can only be seen under a microscope.
Q.2: Explain the main groups of micro-organisms with at least three examples.
Ans: Micro-organisms are mainly classified into three groups as viruses, bacteria, and fungi. Examples Corona Virus, Flagella, Moulds, Yeasts.
Q.3: In how many ways can micro-organisms enter the body.
Ans: Micro-Organisms enter into the body in the following number of ways.
- Through direct contact
- Through indirect contact
- Through Air
- Through Water
- Through contaminated food
- Through animals or insects
- Through cuts or wounds
Ans: Micro-Organisms are important to living things in the following ways.
- Aid in digestion
- Keep nitrogen in balance
- Help in making vaccines
- help in food production.
- Help in making medicines
Ans: Because bacteria and fungi break down the dead and decaying organic matter into simpler substances and provide the nutrients back to the soil.
Post a Comment