Q.4 Answer in one or two sentences:
1. Write the characteristics of viruses.
2. Explain the nutrition in fungi.
3. Fruits can easily be cut with a sharp knife.
4. If a stationary bus suddenly speeds up, passengers are thrown in the backward
direction.
Answers
ans- 1
They are enclosed in a protective envelope.
They are non cellular.
They have a nucleic acid core containing DNA or RNA.
They contain a protien coat called the caspid.
They do not respire, they also donot metabolise and do not grow but they do reproduce.
ans 2.
Fungi get their nutrition by absorbing organic compounds from the environment. They decompose dead organic matter. ... A saprotroph is an organism that obtains its nutrients from non-living organic matter, usually dead and decaying plant or animal matter, by absorbing soluble organic compounds.
ans 3
Since the sharp edged knife makes lesser contact with the fruits to be cut, thus the pressure exerted by it on the fruit is very large. Because of this large pressure, fruits are easily cut with a sharp knife.
ans 4
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction. This is because initially the whole body of a passenger inside the bus was in the state of rest. ... Hence, the passengers are thrown backward when a stationary bus suddenly speeds up.
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