| S.NO. | QUESTION | ANSWER |
|---|---|---|
1 |
What is the basic unit of Classification of living organisms? | Species |
2 |
Fill in the blanks:- "--------- is a group of closely resembling organisms that can interbreed in nature but are not able to sexually reporduce with individual of the same group." | Species (e.g. Cat and Rabbit are two species) |
3 |
True or False:- "Bacteria are unicellular and also have organized nucleus." | False: no organized nucleus |
4 |
What do you understand by the term "autotrophs". | Plant capable of synthesizing its own food from simple organic substances |
5 |
What do you understand by the term "heterotrophs". | An organism which requires an external supply of energy in the form of food as it cannot synthesize its own. |
6 |
Virus is a Latin word. What is its meaning in Latin? | "Poison" |
7 |
Structurally Viruses are not cellular. What are they made up of? | Nucleic acis and Proteins |
8 |
What are two parts of a Virus? | "Outer Coat" and "Inner Core" |
9 |
Fill in the blanks: The "Coat" of a virus is composed of.............. | Protein |
10 |
Fill in the blanks: The "Core" of a virus is composed of.............. | DNA or RNA |
11 |
Which living organism is considered as a link between living and non-living things? | Virus |
12 |
Why viruses are considered as living organisms? | They reproduce like living organisms. |
13 |
Why viruses are considered as non-living organisms? | They are also found in the form of crystals. |
14 |
Fill in the blanks: "All viruses are ----------- and obtain their blood from other living organisms. | Parasites |
15 |
What does SARS stand for? | Severe Acute Repiratory Syndrome |
16 |
What are different shapes and forms of bacteria? | rod-like, round, spiral, comma |
17 |
Fill in the blanks: "A distinct nucleus is absent in bacteria. They have only a single large molecule of ...................... | DNA |
18 |
Which part of a bacteria, if present, helps them in their locomotion? | Flagella (Singular flagellum) |
19 |
Fill in the blanks: "Some bacteria are autotrophs while majority of them are------------------ | Heterotrophs. |
20 |
What are parasitic bacteria? | which live on other living organisms for their nutrition |
| 21 |
What are Pathogenic bacteria? | Those parasitic bacteria which cause diseases. |
22 |
Some bacteria act as decomposers. How is this beneficial for us? | They decompose dead bodies of plants and animals and maintain its fertility. |
23 |
What are the indutrial usages of bacteria? | for manufacturing butter, cheese and yougurt. Also in processing of vinegar, tobacco, coffee and leather. |
24 |
What are the medical usages of bacteria? | used to prepare antibiotics. |
25 |
How food is sterilized? | By exposing it to high temperatures of 120 to 126°C under pressure for 12 to 90 minutes. |
26 |
How milk is pasteurized? | By heating it at 71°C for 15 minutes or at 62°C for 32 minutes |
27 |
What are two major groups of plants on the basis of structure? | Flowering plants and Non-flowering plants |
28 |
Which is the simplest group of plant kingdom? |
Algae |
29 |
Where are Algae found? | In fresh water and sea |
30 |
Fill in the blanks: "Algae are both unicellular and -------------- | Multicellular |
31 |
Fill in the blanks:- "Some ----------- are in the form of filaments. | Algae |
32 |
True or False: "Algae are autotrophs." | True |
33 |
Fill in the blanks: "Algae are source of ------------ and -----------for aquatic animals. | Oxygen and Food |
34 |
True or False: "Algae is an example of flowering plants." | False |
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