Flora & Fauna Dynamics

Golden Mahseer is not a bird. It is a large freshwater fish also called the tiger of the water and found only in the Cauvery river basin. It known for its large size and importance in recreational fishing. Indian Nightjar is a bird species native to India. It is a nocturnal bird that is known for its cryptic plumage and ability to camouflage in its habitat. It is typically found in forests, grasslands, and agricultural areas. Spoonbill is a type of wader bird with a distinctive spoon-shaped bill. It belongs to the family Threskiornithidae and is found in wetlands, mudflats, and coastal habitats in various parts of the world, including India. White Ibis is a species of wading bird found in wetlands and coastal areas. It is recognized by its long, curved bill and white plumage and is commonly seen in India, as well as in other parts of the world.

Out of the listed plants, the following are nitrogen-fixing plants: 1. Alfalfa 3. Chickpea 4. Clover These plants have a symbiotic relationship with bacteria called rhizobia. The bacteria colonize nodules in the plant's roots and fix atmospheric nitrogen into a usable form (nitrates) that the plant can absorb. The other options are not nitrogen-fixing plants:
2. Amaranth 5. Purslane (Kulfa) 6. Spinach These plants require nitrogen from the soil but cannot fix it themselves. They rely on soil nitrogen content or applied fertilizers. Remember: Purslane is a weed. If you would have known this piece of information, the question could have been easily solved by simple elimination. Therefore, the correct answer is (1, 3, 4).

- Ants are well-known as cultivators of fungi. Certain ant species, particularly those in the tribe Attini, have evolved a symbiotic relationship with specific fungi. These ants cultivate the fungus within their nests, providing it with food and a controlled environment. In return, the fungus provides the ants with nutrients. This is a fascinating example of mutualism in nature. - Cockroaches are omnivores and scavengers. They do not cultivate fungi. - Crabs are primarily scavengers or predators. They are not known to cultivate fungi. - Spiders are predators and capture their prey (insects) in webs. They do not cultivate fungi.

Statement 1 is incorrect: The oil palm tree (Elaeis guineensis) is native to West Africa, not Southeast Asia. However, Indonesia and Malaysia are now the largest producers of palm oil because the tree was introduced and widely cultivated there due to favorable tropical conditions. Statement 2 is correct: Palm oil and its derivatives (such as palm kernel oil) are widely used in cosmetic and personal care products, including lipsticks, soaps, and perfumes. It acts as a moisturizing agent, emulsifier, and texture enhancer in these products. Statement 3 is correct: Palm oil is a major feedstock for biodiesel production. Palm-based biodiesel (Palm Methyl Ester - PME) is used as a renewable fuel alternative in several countries, including Malaysia, Indonesia, and parts of Europe.

Hedgehogs: Hedgehogs are small mammals have a unique defense mechanism where they roll up into a tight ball, using their sharp spines as a form of protection against predators. Marmots: Marmots do not roll up to protect themselves. Instead, they typically rely on burrows and their ability to give warning calls to avoid predators. Pangolins: Similar to hedgehogs, pangolins also roll up into a ball when threatened. They use their tough keratin scales as armor to protect their vulnerable parts.

Detritivores: These are organisms that feed on dead and decaying organic matter (detritus). Earthworms: They are classic detritivores, breaking down organic matter in soil and aiding in decomposition. Millipedes: They feed on decaying leaves and other organic debris on the forest floor. Woodlice: These small crustaceans are also detritivores, consuming decaying plant and animal matter. Jellyfish: While they might incidentally ingest some detritus while filtering water for food, they are primarily carnivores, feeding on plankton and small fish. Seahorses: These are also not detritivores. They are carnivores, feeding on small shrimp, plankton, and other invertebrates. Therefore, 1,3 and 5 are detritivores.

The Phosphorus Cycle is unique among major biogeochemical cycles because it does not involve a gaseous phase. Instead, phosphorus primarily moves through the lithosphere (rocks), hydrosphere (water), and biosphere (organisms). - Weathering of Rocks: The main source of phosphorus in this cycle comes from the weathering of phosphate-rich rocks. Over time, geological processes break down these rocks, releasing phosphate ions (PO₄³⁻) into the soil and water.
- Absorption by Plants: Plants absorb phosphorus from the soil, and it moves up the food chain as herbivores and carnivores consume plants and other organisms.
- Return to the Soil: When organisms die, decomposition releases phosphorus back into the environment, where it can re-enter the cycle. - Carbon Cycle: The main source of carbon is atmospheric CO₂, released by respiration, combustion, and volcanic activity. - Nitrogen Cycle: Nitrogen is primarily cycled through the atmosphere, with nitrogen fixation (by bacteria) being a key process. - Sulphur Cycle: Sulfur is mainly released from volcanic eruptions, decaying organic matter, and fossil fuel combustion, rather than rock weathering.

* Filter feeders are a subgroup of suspension-feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialised filtering structure. * Some animals that use this method of feeding are clams, krill, sponges, baleen whales, and many fish (including some sharks). Some birds, such as flamingos and certain species of duck, are also filter feeders. Filter feeders can play an important role in clarifying water, and are therefore considered ecosystem engineers. They are also important in bioaccumulation and, as a result, as indicator organisms. * Oyster is one of the filter feeders. Pearl Farming - Pearls are the only gemstones in the world that come from a living creature. Mollusks such as oysters and mussels produce these precious jewels.
- Pearl culture practices are present in Gujarat, Maharashtra, Bihar, Odisha, Kerala, Rajasthan, Jharkhand, Goa, and Tripura.

Statement 1 is incorrect: Copepods are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Copepods are major secondary producers in the World Ocean. Statement 2 is correct: Diatom refers to any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. They are major primary producers in the food chains of oceans. Statement 3 is correct: Cyanobacteria, also known as Cyanophyta, are a phylum of Gram-negative bacteria that obtain energy via photosynthesis. They are major primary producers in the food chains of oceans. Statement 4 is incorrect: Foraminifera are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular ectoplasm for catching food and other uses; and commonly an external shell of diverse forms and materials. They are the consumer.

Tropical Rainforest: - Hot and moist with year-round rainfall.
- Dense canopy with multiple layers.
- Rapid decomposition due to high temperature and humidity, leaving soil bare.
- Vegetation includes climbers and epiphytes growing on tree branches.
- Different from coniferous, dry deciduous, and mangrove forests. - Species found in these forests include rosewood, mahogony, aini, ebony, etc.
- Distribution in India: mainly found in the Western Ghats, the Northeastern states, the Andaman & Nicobar Islands, and parts of Odisha's Mahanadi Delta. Coniferous Forest: - Found in cold, high-altitude regions.
- Dominated by evergreen trees like pine, fir, spruce, and cedar.
- Needle-like leaves reduce water loss.
- Supports animals like snow leopards, musk deer, and Himalayan black bears.
- Distribution in India: Found in the Himalayan region (Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Arunachal Pradesh, Sikkim). Dry Deciduous Forest: - Trees shed leaves in dry seasons to conserve water.
- Dominated by species like teak, sal, neem, and tendu.
- Soil is fertile, making it good for agriculture.
- Home to tigers, deer, elephants, and langurs.
- Distribution in India: Found in central and western India (Madhya Pradesh, Uttar Pradesh, Rajasthan, Maharashtra, Karnataka, Tamil Nadu, Telangana). Mangrove Forest: - Grow in coastal, saltwater regions.
- Trees have stilt roots to survive in waterlogged conditions.
- Provide breeding grounds for fish and protect coastlines from erosion.
- Home to species like the Royal Bengal Tiger, saltwater crocodiles, and various birds.
- Distribution in India: Found in coastal regions.