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bhawnagupta
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bhawnaguptaBeginner
Asked: 3 months agoIn: Anthropology, Botany, Geography, History, Zoology

The word ‘Denisovan’ is sometimes mentioned in media in reference …

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The word ‘Denisovan’ is sometimes mentioned in media in reference to?

The word ‘Denisovan’ is sometimes mentioned in media in reference to?

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anthropologybotanyhumanszoology
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  1. Pankaj Gupta
    Pankaj Gupta Scholar
    Added an answer about 3 months ago

    The word Denisovan refers to an extinct group of archaic humans that lived in parts of Asia around 50,000 to 200,000 years ago. They are named after the Denisova Cave in Siberia, where their fossils and genetic material were first discovered in 2008. Denisovans are closely related to Neanderthals anRead more

    The word Denisovan refers to an extinct group of archaic humans that lived in parts of Asia around 50,000 to 200,000 years ago. They are named after the Denisova Cave in Siberia, where their fossils and genetic material were first discovered in 2008. Denisovans are closely related to Neanderthals and modern humans, and their DNA has been found in some modern populations, particularly among Melanesians, Aboriginal Australians, and some Southeast Asian groups.

    In media, the term is often mentioned in discussions about human evolution, genetics, and the interbreeding between different human species in ancient times.

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Arshe Alam
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Arshe AlamBeginner
Asked: 4 months agoIn: Zoology

what is the role of nerve cell in human beings.

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what is the role of nerve cell in human beings.

what is the role of nerve cell in human beings.

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  1. Pankaj Gupta
    Pankaj Gupta Scholar
    Added an answer about 4 months ago

    Nerve cells, or neurons, play a critical role in the human body by serving as the fundamental units of the nervous system. Their primary function is to transmit information throughout the body, enabling communication between different parts of the body and the brain. Here's a detailed breakdown of tRead more

    Nerve cells, or neurons, play a critical role in the human body by serving as the fundamental units of the nervous system. Their primary function is to transmit information throughout the body, enabling communication between different parts of the body and the brain. Here’s a detailed breakdown of their roles:

    • Signal Transmission
      • Electrical Impulses: Neurons transmit electrical impulses, known as action potentials, which allow rapid communication within the nervous system.
      • Synaptic Transmission: Neurons communicate with each other through synapses, where chemical signals (neurotransmitters) are released to pass the signal to the next neuron.
    • Sensory Input: Neurons are responsible for receiving sensory input from the environment, such as light, sound, touch, temperature, and pain, and conveying this information to the brain for processing.
    • Motor Control
      • Motor neurons send signals from the brain and spinal cord to muscles, causing them to contract and produce movement.
      • They also help control involuntary actions like the beating of the heart and the movement of food through the digestive system.
    • Cognitive Function
      • Neurons in the brain are involved in complex functions such as thinking, memory, learning, and decision-making.
      • They form complex networks that process and store information, contributing to consciousness and cognitive abilities.
    • Autonomic Function: Neurons in the autonomic nervous system regulate involuntary functions like breathing, heart rate, blood pressure, and digestion, maintaining homeostasis in the body.
    • Reflex Actions: Neurons are crucial for reflex actions, which are rapid and involuntary responses to stimuli. Reflexes protect the body from harm by enabling quick responses without the need for conscious thought.

      Nerve cells are essential for both voluntary and involuntary actions, allowing humans to interact with and respond to their environment, control bodily functions, and engage in complex mental activities.

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    AVG
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    AVGExplorer
    Asked: 4 months agoIn: Zoology

    What were the different types Dinosaurs present on the earth?

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    What were the different types Dinosaurs present on the earth?

    What were the different types Dinosaurs present on the earth?

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    dinosaurtype of dinosaur
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    1. Pankaj Gupta
      Pankaj Gupta Scholar
      Added an answer about 4 months ago

      Dinosaurs were incredibly diverse and can be categorized into various types based on their physical characteristics, diet, and evolutionary lineage. Here's an overview of the main types of dinosaurs: Theropods Diet: Carnivorous (meat-eating). Characteristics: Bipedal, with sharp teeth and claws. ExaRead more

      Dinosaurs were incredibly diverse and can be categorized into various types based on their physical characteristics, diet, and evolutionary lineage. Here’s an overview of the main types of dinosaurs:

      • Theropods
        • Diet: Carnivorous (meat-eating).
        • Characteristics: Bipedal, with sharp teeth and claws.
        • Examples:
          • Tyrannosaurus rex – One of the most famous large predators.
          • Velociraptor – Smaller, agile predator.
          • Allosaurus – A large predator similar to T. rex.
      • Sauropods
        • Diet: Herbivorous (plant-eating).
        • Characteristics: Long necks, long tails, and massive bodies; walked on all fours.
        • Examples:
          • Brachiosaurus – Known for its long neck and large size.
          • Apatosaurus – Formerly known as Brontosaurus, known for its immense size.
          • Diplodocus – Noted for its long, whip-like tail.
      • Ornithopods
        • Diet: Herbivorous.
        • Characteristics: Bipedal or quadrupedal, with beaked mouths.
        • Examples:
          • Iguanodon – One of the first dinosaurs discovered, known for its thumb spike.
          • Hadrosaurus – A type of duck-billed dinosaur.
          • Parasaurolophus – Recognized for its long, curved cranial crest.
      • Ceratopsians
        • Diet: Herbivorous.
        • Characteristics: Quadrupedal, with beaked mouths and often with horns and frills on their heads.
        • Examples:
          • Triceratops – Famous for its three facial horns and large frill.
          • Styracosaurus – Noted for its long nasal horn and spiked frill.
      • Stegosaurs
        • Diet: Herbivorous.
        • Characteristics: Quadrupedal, with distinctive plates along their backs and spiked tails.
        • Examples:
          • Stegosaurus – Known for its double row of plates and tail spikes, called thagomizers.
      • Ankylosaurs
        • Diet: Herbivorous.
        • Characteristics: Quadrupedal, with heavy armor plating and often a clubbed tail.
        • Examples:
          • Ankylosaurus – Recognized for its armored body and tail club.
      • Pachycephalosaurs
        • Diet: Herbivorous or omnivorous.
        • Characteristics: Bipedal, with thick, dome-shaped skulls.
        • Examples:
          • Pachycephalosaurus – Known for its thick skull, possibly used in head-butting behavior.

        These types highlight the incredible variety among dinosaurs, showcasing their adaptations to different environments and niches during the Mesozoic Era.

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      AVG
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      AVGExplorer
      Asked: 5 months agoIn: Zoology

      What are the smallest known dinosaur species ever discovered?

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      What are the smallest known dinosaur species ever discovered?

      What are the smallest known dinosaur species ever discovered?

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      1. AVG
        AVG Explorer
        Added an answer about 5 months ago

        The smallest known dinosaur species ever discovered is the Microraptor, a tiny, feathered dinosaur that lived approximately 120 million years ago during the Early Cretaceous period. Microraptor was about the size of a modern crow or pigeon, measuring around 40-80 centimeters (16-31 inches) in lengthRead more

        The smallest known dinosaur species ever discovered is the Microraptor, a tiny, feathered dinosaur that lived approximately 120 million years ago during the Early Cretaceous period. Microraptor was about the size of a modern crow or pigeon, measuring around 40-80 centimeters (16-31 inches) in length and weighing less than a kilogram (around 2 pounds).

        Another contender is the Oculudentavis khaungraae, which some scientists suggest might be the smallest dinosaur. This species, discovered preserved in amber from Myanmar, had a skull measuring just 1.5 centimeters (0.6 inches), resembling a small bird. However, its classification as a dinosaur has been debated, with some researchers considering it more closely related to ancient reptiles.

        Both examples highlight the diverse range of dinosaur sizes, from massive giants to diminutive creatures.

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      Pankaj Gupta
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      Poll
      Pankaj GuptaScholar
      Asked: 8 months agoIn: Environment, UPSC, Zoology

      How many of the given statements regarding microorganisms are correct?

      • 6

      Consider the following statements:                                                                          ...Read more

      Consider the following statements:                                                                                                         [2023]
      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 a highly acidic environment with a pH below 3.

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      microorganismspollquestionupsc pre 2023
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      1. Pankaj Gupta
        Pankaj Gupta Scholar
        Added an answer about 8 months ago
        This answer was edited.

        Here’s an explanation for each statement: Some microorganisms can grow in environments with temperatures above the boiling point of water: This is correct. Certain microorganisms, known as thermophiles or hyperthermophiles, can thrive in extremely hot environments, such as hydrothermal vents, whereRead more

        Here’s an explanation for each statement:

        1. Some microorganisms can grow in environments with temperatures above the boiling point of water: This is correct. Certain microorganisms, known as thermophiles or hyperthermophiles, can thrive in extremely hot environments, such as hydrothermal vents, where temperatures exceed 100°C (the boiling point of water at sea level).
        2. Some microorganisms can grow in environments with temperatures below the freezing point of water: This is correct. Psychrophiles are microorganisms that can grow in extremely cold environments, including those with temperatures below 0°C, such as in polar regions or glaciers.
        3. Some microorganisms can grow in a highly acidic environment with a pH below 3: This is correct. Acidophiles are microorganisms that can thrive in highly acidic conditions, including environments with pH levels as low as 1, such as in acid mine drainage or acidic hot springs.

        Thus, all three statements are correct. The correct answer is All three.

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      Pankaj Gupta
      • 5
      Poll
      Pankaj GuptaScholar
      Asked: 8 months agoIn: Environment, UPSC, Zoology

      How many of the given statements are correct regarding the Indian squirrels?

      • 5

      Consider the following statements regarding the Indian squirrels:                                                      [2023] 1. They build nests by ...Read more

      Consider the following statements regarding the Indian squirrels:                                                      [2023]
      1. They build nests by making burrows in the ground.
      2. They store their food materials like nuts and seeds in the ground.
      3. They are omnivorous.

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      envionmentindian squirrelspollquestionupsc pre 2023zoology
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      1. Pankaj Gupta
        Pankaj Gupta Scholar
        Added an answer about 8 months ago
        This answer was edited.

        It looks like the text is explaining the habits and habitats of Indian squirrels and verifying the correctness of certain statements about them. Here’s a brief summary: Habitat: Indian squirrels are found in India (south of the Vindhyas) and Sri Lanka, living in various environments like forests, grRead more

        It looks like the text is explaining the habits and habitats of Indian squirrels and verifying the correctness of certain statements about them. Here’s a brief summary:

        1. Habitat: Indian squirrels are found in India (south of the Vindhyas) and Sri Lanka, living in various environments like forests, grasslands, and urban areas.
        2. Behavior: They are solitary, active during the day, and build nests in treetops.
        3. Food Storage: They store nuts and seeds in the ground for times when food is scarce.
        4. Diet: They are omnivores, eating nuts, fruits, seeds, insects, small mammals, reptiles, eggs, and sometimes bird chicks.

        Based on this information, the correct answer to the question seems to be option only two.

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      Pankaj Gupta
      • 6
      Poll
      Pankaj GuptaScholar
      Asked: 8 months agoIn: Environment, UPSC, Zoology

      Which of these species perform waggle dance ?

      • 6

      Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food?                              ...Read more

      Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food?                                                                    [2023]

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      environmentpollquestionupsc pre 2023zoology
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      1. Pankaj Gupta
        Pankaj Gupta Scholar
        Added an answer about 8 months ago
        This answer was edited.

        The correct answer is: Honey Bees. Honey bees perform the "waggle dance" to communicate the direction and distance of a food source to other members of their hive. The dance involves a series of movements, including waggling their bodies and making figure-eight patterns, to convey information aboutRead more

        The correct answer is: Honey Bees. Honey bees perform the “waggle dance” to communicate the direction and distance of a food source to other members of their hive. The dance involves a series of movements, including waggling their bodies and making figure-eight patterns, to convey information about the location of nectar, pollen, or water. This sophisticated form of communication is crucial for the foraging efficiency and survival of the colony. Neither butterflies, dragonflies, nor wasps use this method of communication.

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      Pankaj Gupta
      • 6
      Poll
      Pankaj GuptaScholar
      Asked: 8 months agoIn: Environment, UPSC, Zoology

      How many of the given animals are generally nocturnal or most active after sunset?

      • 6

      Consider the following fauna:                                                                          ...Read more

      Consider the following fauna:                                                                                                                 [2023]
      1. Lion-tailed Macaque
      2. Malabar Civet
      3. Sambar Deer

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      environmentpollquestionupsc pre 2023zoology
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      1. Pankaj Gupta
        Pankaj Gupta Scholar
        Added an answer about 8 months ago
        This answer was edited.

        Lion-tailed Macaque: This species is primarily diurnal, meaning it is active during the day and rests at night. They are known for their distinctive mane and tail tuft, and they inhabit the rainforests of the Western Ghats in India. Malabar Civet: The Malabar Civet is generally nocturnal. It is mostRead more

        1. Lion-tailed Macaque: This species is primarily diurnal, meaning it is active during the day and rests at night. They are known for their distinctive mane and tail tuft, and they inhabit the rainforests of the Western Ghats in India.
        2. Malabar Civet: The Malabar Civet is generally nocturnal. It is most active during the night and is rarely seen during the day. It is a critically endangered species native to the Western Ghats and nearby regions.
        3. Sambar Deer: The Sambar Deer is largely nocturnal or crepuscular (active during twilight). It tends to be most active during the early morning and late evening but can also be seen foraging at night.

        Given this information, two of the listed fauna (Malabar Civet and Sambar Deer) are generally nocturnal or most active after sunset. Therefore, the correct answer is: Only two.

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