Biology MCQs

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Rabies disease is transmitted by animal bites and saliva.

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Shipping fever in cattle is a complex respiratory disease caused by Pasteurella haemolytica, Pasteurella multocida, and Mannheimia haemolytica. These bacteria are often normal inhabitants of the respiratory system but can become pathogenic under certain circumstances, such as the stress of transportation, hence the name “Shipping fever”. It is an important disease in the field of veterinary medicine, especially in beef cattle, due to its economic impact.

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Ringworm or round red or silver type superficial fungal infections of the skin are caused by species of Trichophyton, Microsporum, and Epidermatophyton. There are dry scaly lesions on the skin, nails, and scalp that cause intense itching.

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A dominant Trait is a trait that “overpowers” and hides another trait.

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Eye color, Sound of your voice, and Hair color are examples of Phenotype. The observable physical properties of an organism are called Phenotypes.

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A rare way that a trait or disorder can be passed down through families is called Sex-linked dominant. An abnormal gene on the X chromosome can cause sex-linked dominant disease.

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Animals, such as mammals and birds, that maintain a constant body temperature regardless of the temperature of the surroundings are called warm blooded. These include birds and mammals. Whales are aquatic mammals hence, being mammal, they are warm blooded. The have a thick layer of fats called blubber underneath their skin to maintain temperature even in cold water of oceans.

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Skeletal muscle is a form of striated muscle which is under the voluntary control of the somatic nervous system. Most skeletal muscles are attached to bones by bundles of collagen fibres known as tendons. It is one of three major muscle types, the others being cardiac muscle and smooth muscle.

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Plants and photosynthetic organisms utilize this solar energy in fixing large amounts of CO2 while amounts consumed by human beings are relatively small representing only 10% of the energy converted during photosynthesis. The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen.

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Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microorganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin so also tetanus.