Question

জলে থাকে তবে খালি চোখে দেখা যায় না ​

Answer 1

পোকা-মাকড়/তৃতীয় শাখার প্রাণী/হাইড্রা।

Answer 2

The correct answer is Micro organism

• Microorganism are Bacteria, Fungus, Virus, Parasitic organisms are found in the water but cannot be seen with the naked eyes.
• They can be seen only through a microscope. Since they are small in size which equals to Viruses are typically 1/10th that size. Animal cells are typically around 10 micrometers in size.
• There are some bacteria which are useful for human life. Even in our body, there are some good bacteria which are useful in the digestion process.