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    Home MCQ examination Jamb Biology 2019

    Biology 2019 Jamb Examination

    Biology 2019 Jamb Examination
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    1...45678

    Question 51

    The movement of blood between the heart and all other parts of the body beside the lungs is
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    Systemic circulation refers to the flow of blood from the heart to the rest of the body and back, excluding the lungs. It delivers oxygen and nutrients to tissues and removes carbon dioxide and wastes efficiently.
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    Question 52

    The change in the genetic make up of an organism resulting in an inheritable characteristics which is new is
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    A mutation is a permanent alteration in the DNA sequence of an organism. Such genetic changes can be inherited if they occur in gametes, leading to new traits that may affect survival or reproduction.
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    Question 53

    The organic molecule(s) present in the nucleus is/are
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    The nucleus contains primarily DNA, which stores genetic information. Proteins such as histones are associated with DNA to form chromatin, but DNA itself is the essential organic molecule responsible for inheritance.
    Not clear enough?

    Question 54

    Albinism is an expression of trait controlled by
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    Albinism results from recessive alleles that prevent melanin production. Individuals must inherit two copies of the recessive gene, one from each parent, for the trait to be expressed visibly.
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    Question 55

    The male sex cells also called gametes are produced in the testes by a process called
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    Spermatogenesis is the process by which male gametes, or sperm cells, are produced in the seminiferous tubules of the testes. It involves meiosis and differentiation to form functional sperm capable of fertilization.
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    Question 56

    Which of the following describes an example of fertilization in higher organisms?
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    Fertilization occurs when the sperm nucleus fuses with the egg nucleus, forming a zygote. This fusion restores the diploid number of chromosomes and initiates the development of a new organism.
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    Question 57

    The part labeled III in the above diagram is
    The part labeled III in the above diagram is
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    The part labeled III in the diagram is hyphae, which are filamentous structures in fungi. They absorb nutrients from the environment by secreting enzymes and increasing surface area for nutrient uptake.
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    Question 58

    The organism above can be found in
    The organism above can be found in
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    Fungi, like the one shown in the diagram, thrive in moist environments where there is sufficient water for enzymatic activity and spore germination. Moist habitats support their growth and reproduction.
    Not clear enough?

    Question 59

    The possession of chloroplast in Euglena virids enables it to
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    Euglena viridis contains chloroplasts, which allow it to photosynthesize, converting light energy, water, and carbon dioxide into glucose and oxygen. This autotrophic adaptation helps the organism survive when light is available.
    Not clear enough?

    Question 60

    Viruses are pathogens of the following diseases except
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    Tuberculosis is caused by bacteria (Mycobacterium tuberculosis) rather than viruses. In contrast, measles, smallpox, and poliomyelitis are viral diseases, highlighting the distinction between viral and bacterial pathogens.
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