They build nests by making burrows in the ground This is generally incorrect for the common Indian squirrels (like the Indian Palm Squirrel). Tree squirrels, which are prevalent in India, typically build nests called 'dreys' high up in trees using twigs, leaves, and other plant materials. While some squirrel species (ground squirrels) do burrow, this is not characteristic of the squirrels commonly referred to in India in this context. 2. They store their food materials like nuts and seeds in the ground This is correct. Burying or 'caching' nuts and seeds is a common behaviour among many squirrel species, including Indian squirrels, to store food for later consumption, particularly during scarcity. 3. They are omnivorous This is correct. While their diet primarily consists of plant material like nuts, seeds, fruits, and buds, Indian squirrels are known to also eat insects, larvae, bird eggs, and occasionally small vertebrates, making them omnivorous. 163. Consider the following statements: 1. Some microorganisms can grow in environments with temperature above the boiling point of water. 2. Some microorganisms can grow in environments with temperature below the freezing point of water. 3. Some microorganisms can grow in highly acidic environment with a pH below 3. How many of the above statements are correct?
Asked in UPSC IAS 2023 · Topic: Taxonomy (Taxonomic Characters and Evidence (Morphological, Anatomical, Cytological, Molecular))
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- Some microorganisms can grow in environments with temperature above the boiling point of water This is correct. Thermophiles and hyperthermophiles are types of extremophilic microorganisms (often Archaea and Bacteria) that thrive at very high temperatures, such as those found in hydrothermal vents or hot springs, where temperatures can exceed 100°C and even reach above 120°C under pressure. 2. Some microorganisms can grow in environments with temperature below the freezing point of water This is correct. Psychrophiles are extremophilic microorganisms that are capable of growth and reproduction in cold temperatures, typically between -15°C and 10°C. They are found in environments like polar ice, glaciers, permafrost, and the deep sea. 3. Some microorganisms can grow in highly acidic environment with a pH below 3 This is correct. Acidophiles are extremophilic microorganisms that thrive in highly acidic environments, with optimum pH levels typically between 0 and 3. Examples include species found in acid mine drainage or volcanic sulfur springs. 164. Consider the following trees: 1. Jackfruit (Artocarpus heterophyllus) 2. Mahua (Madhuca indica) 3. Teak (Tectona grandis) How many of the above are deciduous trees?
- Consider the following : 1. Carabid beetles 2. Centipedes 3. Flies 4. Termites 5. Wasps Parasitoid species are found in how many of the above kind of organisms ?
- Consider the following plants : 1. Groundnut 2. Horse-gram 3. Soybean How many of the above belong to the pea family ?
- The organisms “Cicada, Froghopper and Pond skater” are :
- Consider the following pairs : Animal found in its natural hab‐ Country itat 1. Brazil Indri 2. Indonesia Elk 3. Madagas‐ Bonobo car How many of the pairs given above are correctly matched ?
- Consider the following statements : 1. Lions do not have a particular breeding season. 2. Unlike most other big cats, cheetahs do not roar. 3. Unlike male lions, male leopards do not proclaim their territory by scent marking. Which of the statements given above are correct ?
- Consider the following : Butterflies Fish Frogs How many of the above have poisonous species among them ?
- Lichens represent the symbiotic relationships between algae and fungi. The algae component present in lichen is best known as