1. The wide range of living types in nature shows:
Correct Answer: B
The living world includes many different types of organisms like plants, animals, insects, birds and microorganisms. This wide variety is called biodiversity. For example, a tiny ant, a huge elephant, a green tree and a blue whale are all living but very different.
2. Living organisms are found in places such as:
Correct Answer: D
Living organisms can survive in many different habitats. For example, yaks live in cold mountains, fish live in oceans, camels live in deserts and some bacteria live in hot springs. This shows life can exist in extreme conditions.
3. The beauty of galloping horses and migrating birds creates:
Correct Answer: C
When we see a horse running fast or birds flying together in the sky, we feel amazed. Such natural beauty fills us with awe and wonder. It makes us think about how beautifully life is designed.
4. Interaction among members of a population includes:
Correct Answer: C
In nature, organisms may fight for food (conflict) or help each other (cooperation). For example, lions may compete for prey, while ants work together to build colonies. Both types of interactions occur in populations.
5. The movement of molecules inside a cell is referred to as:
Correct Answer: A
Inside every cell, many molecules like proteins and nutrients move continuously. This movement is called molecular traffic. For example, oxygen enters cells and waste materials leave cells. This keeps the cell alive and active.
6. The question 'What is life?' includes:
Correct Answer: C
The question 'What is life?' has two parts. One asks scientifically what makes something living or non-living. The other asks about the purpose of life, which is philosophical. Scientists mainly focus on the scientific explanation.
7. Scientists mainly try to answer:
Correct Answer: C
Scientists study characteristics like growth, reproduction and metabolism to understand what makes something living. For example, a plant grows and reproduces, but a stone does not. So science focuses on defining living organisms clearly.
8. The term 'Diversity in the Living World' refers to:
Correct Answer: B
Diversity in the living world means the large variety of living organisms around us. For example, plants in pots, birds in the sky, insects, pets and even tiny bacteria are all different kinds of living beings. This wide variety makes the living world diverse and rich.
9. Some organisms cannot be seen because:
Correct Answer: C
Many organisms like bacteria and some fungi are too small to be seen without a microscope. Even though we cannot see them with our naked eyes, they are present everywhere around us, in air, water and soil.
10. If we increase the area of observation, we will:
Correct Answer: B
When we explore larger areas, like forests, oceans or mountains, we see more kinds of plants and animals. For example, a forest has many more species compared to a small garden. Larger areas usually show greater biodiversity.
11. A dense forest usually contains:
Correct Answer: C
Dense forests are rich in life. They contain trees, shrubs, insects, birds, mammals, reptiles and microorganisms. Because many organisms live together in forests, biodiversity there is much higher than in cities or villages.
12. Each different kind of plant or animal represents a:
Correct Answer: B
A species is a group of similar organisms that can reproduce among themselves. For example, all dogs belong to one species. Each different kind of plant or animal we see usually represents a separate species.
13. The number of known and described species on Earth is approximately:
Correct Answer: C
Scientists have identified and described about 1.7 to 1.8 million species so far. This includes plants, animals and microorganisms. However, many more species are still unknown and yet to be discovered.
14. Biodiversity refers to:
Correct Answer: A
Biodiversity means the variety and number of living organisms present on Earth. For example, different types of plants, animals, insects and microbes together form Earth's biodiversity.
15. New organisms are continuously being identified because:
Correct Answer: B
Scientists keep exploring forests, oceans and even deserts. When they study new areas carefully, they sometimes discover species that were not known before. That is why the number of identified species keeps increasing.
16. Local names of organisms:
Correct Answer: C
Local names differ in different regions. For example, a mango may have different local names in different states. This creates confusion, which is why scientists use scientific names to avoid misunderstanding.
17. Scientific naming is necessary to:
Correct Answer: B
Since local names vary from place to place, scientific names help everyone refer to the same organism clearly. For example, Mangifera indica is the scientific name of mango everywhere in the world.
18. The need to standardise naming of organisms is to:
Correct Answer: B
Standardising names ensures that a particular organism is known by the same name everywhere in the world. For example, mango is called by many local names, but its scientific name Mangifera indica is the same globally. This avoids confusion among scientists.
19. The process of giving scientific names to organisms is called:
Correct Answer: C
Nomenclature means assigning a scientific name to an organism. For example, giving the name Mangifera indica to mango is nomenclature. It ensures uniform naming so scientists across the world can communicate clearly without confusion.
20. Correct naming is possible only after proper:
Correct Answer: B
Before giving a scientific name, the organism must be correctly identified. Identification means recognizing what the organism actually is. For example, we must confirm it is a mango tree before naming it Mangifera indica.
21. The scientific naming of plants follows:
Correct Answer: B
Plant names follow rules given in the International Code for Botanical Nomenclature (ICBN). These rules help scientists name plants properly. For example, all plant scientific names must follow specific guidelines under ICBN.
22. Animals are named according to:
Correct Answer: B
Animals are named according to the International Code of Zoological Nomenclature (ICZN). This code provides rules for naming animals. For example, the tiger’s scientific name Panthera tigris follows ICZN rules.
23. Scientific names ensure that:
Correct Answer: B
Scientific naming ensures that each organism has only one accepted name worldwide. For example, humans are scientifically known as Homo sapiens everywhere, avoiding confusion caused by different local names.
24. Binomial nomenclature means:
Correct Answer: C
Binomial nomenclature is a two-word naming system. The first word represents the genus and the second word represents the species. For example, in Mangifera indica, Mangifera is genus and indica is species.
25. Binomial nomenclature was given by:
Correct Answer: B
Carolus Linnaeus introduced the binomial nomenclature system. He suggested that every organism should have a two-word scientific name. This system is still followed worldwide in biology.
26. In the scientific name Mangifera indica, Mangifera represents:
Correct Answer: C
In Mangifera indica, Mangifera is the genus name. The genus groups closely related species. For example, all mango varieties belong to the genus Mangifera.
27. In Mangifera indica, indica represents:
Correct Answer: B
In Mangifera indica, indica is the specific epithet. It identifies the particular species within the genus Mangifera. Together, genus and species form the complete scientific name.
28. Biological names are generally written in:
Correct Answer: C
Scientific names are written in Latin or are Latinised and printed in italics. Latin is used because it is a universal and unchanging language. For example, Mangifera indica is written in italics to show it is a scientific name.
29. In a biological name, the first word represents the:
Correct Answer: B
The first word in a biological name represents the genus. For example, in Mangifera indica, Mangifera is the genus. The genus groups closely related species together under one common name.
30. The second word in a biological name denotes the:
Correct Answer: C
The second word in a scientific name is called the specific epithet. For example, in Mangifera indica, indica identifies the exact species within the genus Mangifera.
31. When handwritten, biological names should be:
Correct Answer: C
When scientific names are handwritten, both words must be underlined separately. For example, Mangifera indica should be underlined word by word to indicate that it is a scientific name.
32. In printed form, biological names are written in:
Correct Answer: B
In books and printed materials, scientific names are written in italics. For example, Mangifera indica is printed in italics to show that it is a Latin scientific name.
33. The genus name in a scientific name starts with:
Correct Answer: B
The genus name always starts with a capital letter. For example, in Mangifera indica, Mangifera begins with a capital 'M' because it represents the genus.
34. The specific epithet in a scientific name starts with:
Correct Answer: C
The specific epithet always starts with a small letter. For example, in Mangifera indica, indica begins with a small 'i' because it represents the species.
35. In Mangifera indica Linn., 'Linn.' indicates:
Correct Answer: C
The name written after the species is the author’s name. In Mangifera indica Linn., 'Linn.' shows that Linnaeus first described this species. It is written in abbreviated form.
36. The author’s name in biological nomenclature is written:
Correct Answer: B
The author’s name appears after the specific epithet and is written in short form. For example, in Mangifera indica Linn., Linn. is the abbreviated name of Linnaeus.
37. The process of grouping organisms into convenient categories is called:
Correct Answer: C
Classification is the process of grouping living organisms based on similarities. For example, grouping dogs and cats under animals, or grouping wheat and rice under plants. It helps us study and understand living organisms easily.
38. Classification is based on:
Correct Answer: C
Classification groups organisms based on observable features. For example, mammals have body hair and external ears. These visible features help us place organisms into correct categories.
39. The scientific term used for categories in classification is:
Correct Answer: B
The term 'taxa' refers to categories used in classification. For example, animals, mammals, dogs and wheat are all taxa. These categories help in organizing living organisms for easier study.
40. When we think of 'mammals', we usually associate them with:
Correct Answer: C
Mammals are animals that have body hair and external ears. For example, humans, dogs and cows are mammals. These features help us identify them as belonging to the mammal group.
41. The term 'Wheat' represents:
Correct Answer: B
Wheat represents a specific category or taxa in classification. When we say wheat, we imagine wheat plants, not rice or other plants. This shows how classification helps in clearly identifying organisms.
42. Animals, mammals and dogs represent:
Correct Answer: B
Animals, mammals and dogs belong to different levels of classification. A dog is a mammal, and mammals are animals. This shows that taxa exist at different hierarchical levels.
43. The science of classification is called:
Correct Answer: C
Taxonomy is the science of classification. It deals with identifying, naming and classifying organisms. For example, placing humans under mammals and mammals under animals is part of taxonomy.
44. Modern taxonomic studies are based on:
Correct Answer: C
Modern taxonomy considers many factors like body structure, cell structure, development process and ecological information. For example, similarities in DNA and cell structure help scientists classify organisms more accurately.
45. The basic processes of taxonomy include:
Correct Answer: B
Taxonomy includes four basic processes: characterisation (studying features), identification (recognizing the organism), classification (grouping organisms) and nomenclature (naming them). For example, identifying a mango tree, grouping it under plants and naming it Mangifera indica are parts of taxonomy.
46. Early classification of organisms was mainly based on:
Correct Answer: C
In early times, humans classified organisms based on their usefulness. For example, plants were grouped as food plants, medicinal plants or fiber plants. This helped people meet their needs like food, clothing and shelter.
47. Systematics is the study of:
Correct Answer: C
Systematics studies the diversity of organisms and their relationships with each other. It not only identifies and names organisms but also studies how different species are related through evolution.
48. The word 'systematics' is derived from the Latin word:
Correct Answer: A
The word systematics comes from the Latin word 'systema', which means systematic arrangement. It refers to arranging organisms in an organized manner based on similarities and relationships.
49. Linnaeus used 'Systema Naturae' as:
Correct Answer: B
Linnaeus used 'Systema Naturae' as the title of his famous publication. In this book, he described and classified many organisms systematically, laying the foundation for modern taxonomy.
50. Modern systematics includes:
Correct Answer: C
Modern systematics includes identification, naming, classification and also studies evolutionary relationships among organisms. For example, humans and monkeys are placed closer because they share evolutionary similarities.
51. Systematics takes into account:
Correct Answer: B
Systematics considers evolutionary relationships among organisms. For example, whales and humans are both mammals and share a common ancestor. This evolutionary connection is studied in systematics.