1. Examples like potted plants, insects, birds, pets, and other animals mainly show:
Correct Answer: A
When we observe our surroundings, we can see many different types of living organisms such as plants, insects, birds, pets, and other animals. These examples show that the living world contains a wide variety of organisms with different forms and characteristics. This illustrates the diversity of life around us.
2. Some organisms around us cannot be seen with the naked eye because they are:
Correct Answer: B
Around us there are many living organisms such as plants, insects, birds, and animals that we can easily see. However, many organisms like bacteria and some other microorganisms are extremely small and cannot be seen with the naked eye. These microscopic organisms require a microscope to be observed.
3. What happens if the area of observation is increased while studying living organisms?
Correct Answer: B
When we observe a small area, we see only a limited number of organisms. But if we increase the area of observation, we will notice many more types of living organisms. Different regions have different plants, animals, and microorganisms. Therefore, the range and diversity of organisms increase as the observation area becomes larger.
4. Why does a dense forest show a greater number and kinds of living organisms?
Correct Answer: B
Dense forests provide a variety of habitats, food sources, and environmental conditions that support many forms of life. Plants, animals, insects, birds, fungi, and microorganisms can all live there. Because of this rich environment, forests usually contain a much larger number and variety of living organisms.
5. Each different kind of plant, animal or organism is called a:
Correct Answer: B
In biology, a species refers to a group of organisms that share similar characteristics and can reproduce among themselves to produce fertile offspring. Each different kind of plant, animal, or microorganism observed in nature represents a separate species.
6. The number of species known and described by scientists is approximately:
Correct Answer: B
Scientists have identified and described about 1.7 to 1.8 million species of living organisms. These include plants, animals, fungi, bacteria, and other microorganisms. However, many more species are believed to exist on Earth that have not yet been discovered or described.
7. The number and types of organisms present on Earth is called:
Correct Answer: B
Biodiversity refers to the variety of life on Earth. It includes the number of different species as well as the different types of organisms present in various ecosystems. High biodiversity means a large variety of plants, animals, and microorganisms living on the planet.
8. Why are new organisms continuously being identified by scientists?
Correct Answer: B
Scientists continue to explore new environments such as forests, oceans, mountains, and even microscopic habitats. During these explorations, they discover and identify new species of organisms. Even in previously studied areas, improved techniques and careful observation help scientists find organisms that were not identified earlier.
9. Why do scientists avoid using only local names for plants and animals?
Correct Answer: B
Plants and animals are often known by different local names in different regions. Even within the same country, the same organism may have many different names. This can create confusion when people try to communicate about organisms. Therefore, scientists use standardized scientific names to avoid misunderstanding.
10. Why is standardisation of naming of living organisms necessary?
Correct Answer: B
Standardisation of naming ensures that each organism is known by the same scientific name all over the world. Since local names vary from region to region and may create confusion, scientists use a universal system of naming called scientific nomenclature. This helps researchers communicate clearly about organisms.
11. The process of standardising the naming of living organisms so that each organism has the same name worldwide is called:
Correct Answer: B
Nomenclature is the system used in biology to give organisms standard scientific names. Since local names vary from place to place, a universal naming system helps scientists across the world refer to the same organism without confusion.
12. Correctly recognising and describing an organism before naming it is called:
Correct Answer: B
Before an organism can be given a scientific name through nomenclature, it must first be correctly recognised and described. This process of determining and confirming what an organism is, based on its characteristics, is called identification.