Biology miscellaneous


  1. Wisdom teeth is the :









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    A wisdom tooth, in humans, is any of the usual four third molars. Wisdom teeth usually appear between the ages of 16 and 25. They are generally thought to be called wisdom teeth because they appear so late – much later than the other teeth, at an age where people are presumably “wiser” than as a child, when the other teeth erupt. The term probably came as a translation of the Latin dens sapientiae.

    Correct Option: C

    A wisdom tooth, in humans, is any of the usual four third molars. Wisdom teeth usually appear between the ages of 16 and 25. They are generally thought to be called wisdom teeth because they appear so late – much later than the other teeth, at an age where people are presumably “wiser” than as a child, when the other teeth erupt. The term probably came as a translation of the Latin dens sapientiae.


  1. The method not used as a Biological control is :









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    Pesticides are substances or mixture of substances intended for preventing, destroying, repelling or mitigating any pest. Pesticides are a special kind of products for crop protection. Crop protection products in general protect plants from damaging influences such as weeds, diseases or insects. A pesticide is generally a chemical or biological agent (such as a virus, bacterium, antimicrobial or disinfectant) that through its effect deters, incapacitates, kills or otherwise discourages pests. Target pests can include insects, plant pathogens, weeds, molluscs, birds, mammals, fish, nematodes (roundworms), and microbes that destroy property, cause nuisance, spread disease or are vectors for disease.

    Correct Option: C

    Pesticides are substances or mixture of substances intended for preventing, destroying, repelling or mitigating any pest. Pesticides are a special kind of products for crop protection. Crop protection products in general protect plants from damaging influences such as weeds, diseases or insects. A pesticide is generally a chemical or biological agent (such as a virus, bacterium, antimicrobial or disinfectant) that through its effect deters, incapacitates, kills or otherwise discourages pests. Target pests can include insects, plant pathogens, weeds, molluscs, birds, mammals, fish, nematodes (roundworms), and microbes that destroy property, cause nuisance, spread disease or are vectors for disease.



  1. An insect - catching plant is :









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    Nepenthes mirabilis or the Common Swamp Pitcher-Plant, is a tropical carnivorous plant species of the pitfall trap variety. It has by far the widest distribution of any Nepenthes species and is known from the following countries and regions. A great number of infaunal organisms have been found in the pitchers of this species. These include the sarcophagid fly Sarcophaga papuensis and the mite Nepenthacarus warreni.

    Correct Option: C

    Nepenthes mirabilis or the Common Swamp Pitcher-Plant, is a tropical carnivorous plant species of the pitfall trap variety. It has by far the widest distribution of any Nepenthes species and is known from the following countries and regions. A great number of infaunal organisms have been found in the pitchers of this species. These include the sarcophagid fly Sarcophaga papuensis and the mite Nepenthacarus warreni.


  1. Bones are pneumatic in









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    Pneumatic boneis ia hollow bone filled with air, connected to the respiratory system. Many of a bird’s bones are pneumatic, with struts across their hollow interiors to provide a combination of light weight and strength as an adaptation to flying. For flight to occur in Aves, four physical forces (thrust and drag, lift and weight) must work together. In order for birds to balance these forces, certain physical characteristics are required. Flying birds have evolved reduced weight through several characteristics. Pneumatic bone is hollow or filled with air sacs, reducing weight. The loss of teeth, gonadal hypertrophy, and fusion of bones also reduce weight. Teeth have been replaced by a light weight bill made of keratin, and chewing occurs in the bird’s gizzard. Other physical characteristics required for flight are a keel for the attachment of flight muscles, an enlarged cerebellum for fine motor coordination, and a furcula, which enhances skeletal bracing for the stresses of flight.

    Correct Option: D

    Pneumatic boneis ia hollow bone filled with air, connected to the respiratory system. Many of a bird’s bones are pneumatic, with struts across their hollow interiors to provide a combination of light weight and strength as an adaptation to flying. For flight to occur in Aves, four physical forces (thrust and drag, lift and weight) must work together. In order for birds to balance these forces, certain physical characteristics are required. Flying birds have evolved reduced weight through several characteristics. Pneumatic bone is hollow or filled with air sacs, reducing weight. The loss of teeth, gonadal hypertrophy, and fusion of bones also reduce weight. Teeth have been replaced by a light weight bill made of keratin, and chewing occurs in the bird’s gizzard. Other physical characteristics required for flight are a keel for the attachment of flight muscles, an enlarged cerebellum for fine motor coordination, and a furcula, which enhances skeletal bracing for the stresses of flight.



  1. Columba livia is the scientific name of









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    The Rock Dove (Columba livia) or Rock Pigeon, is a member of the bird family Columbidae (doves and pigeons). In common usage, this bird is often simply referred to as the “pigeon”. The species includes the domestic pigeon (including the fancy pigeon), and escaped domestic pigeons have given rise to feral populations around the world. The Rock Dove was first described by Gmelin in 1789. The genus name Columba is the Latinized form of the Ancient Greek (kolumbos), “a diver”. Aristophanes and others use the word kolumbis, “diver”, for the name of the bird, because of its swimming motion in the air.

    Correct Option: A

    The Rock Dove (Columba livia) or Rock Pigeon, is a member of the bird family Columbidae (doves and pigeons). In common usage, this bird is often simply referred to as the “pigeon”. The species includes the domestic pigeon (including the fancy pigeon), and escaped domestic pigeons have given rise to feral populations around the world. The Rock Dove was first described by Gmelin in 1789. The genus name Columba is the Latinized form of the Ancient Greek (kolumbos), “a diver”. Aristophanes and others use the word kolumbis, “diver”, for the name of the bird, because of its swimming motion in the air.