जीव विज्ञान – Zoology – Zoology MCQ

जीव विज्ञान – Zoology: प्रश्न र उत्तर

सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।

सही: ० / ०

151. Which of the following correctly identifies the primary role of erythrocytes (red blood cells) within the circulatory system?

     कA) Transporting oxygen from lungs to tissues. खB) Filtering waste products from the blood. गC) Initiating blood clotting during injury. घD) Regulating blood pressure and heart rate.
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152. The process of metamorphosis observed in amphibians like tadpoles involves a drastic change in body form. Which of the following accurately represents the primary developmental stage during this transformation?

     कA) The larval stage, characterized by gills and a lateral tail. खB) The pupal stage, involving complete reorganization of tissues. गC) The adult stage, retaining features of both larval and juvenile forms. घD) The embryonic stage, where limbs and sensory organs develop.
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153. A researcher observes a group of aquatic invertebrates displaying remarkable regenerative abilities, including limb regrowth and even partial body restoration after injury. Which phylum would these organisms most likely belong to?

     कChordata खArthropoda गMollusca घEchinodermata
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154. Which of the following correctly identifies the main role of peristalsis in the digestive system?

     कAbsorption of nutrients into the bloodstream खPropulsion of food along the alimentary canal by rhythmic wave contractions गStorage of undigested material for excretion घSecretion of enzymes to break down food molecules
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155. The phenomenon of ‘positive geotaxis’ observed in many invertebrates refers to:

     कTheir tendency to move towards warmer temperatures खTheir inclination to orient themselves with their ventral surface downwards गTheir ability to detect and respond to changes in light intensity घTheir preference for moist environments over dry ones
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156. The primary function of the contractile vacuoles in freshwater protozoa such as *Paramecium* is:

     कTo absorb nutrients directly from the water खTo filter out excess salts from the cytoplasm गTo regulate osmoregulation by expelling excess water घTo capture food particles floating in the water
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157. A patient with type O blood has a positive Rh factor. Which statement accurately describes this individual's genetic makeup?

     कThey have two copies of the A antigen gene खThey inherited the Rh-positive allele from both parents गThey are homozygous for the Rh-positive allele घThey are heterozygous for the Rh-positive allele
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158. The life cycle of *Plasmodium* involves multiple hosts. During which stage is the mosquito infected?

     कSporozoite खGametocyte गOocyst घTrophozoite
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159. A couple, both carriers of sickle cell anemia, have a child. What is the probability that the child will also have sickle cell trait?

     क1/4 ख1/2 ग3/4 घ1
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160. Which of the following accurately describes the process of metamorphosis observed in amphibians like frogs? (a) A gradual increase in body size and complexity throughout life. (b) A complete transformation from a larval aquatic form to an adult terrestrial form with distinct developmental stages. (c) Permanent changes in gene expression that result in mature reproductive organs. (d) Continuous maturation of somatic cells alongside sexual differentiation.

     क(a) A gradual increase in body size and complexity throughout life. ख(b) A complete transformation from a larval aquatic form to an adult terrestrial form with distinct developmental stages. ग(c) Permanent changes in gene expression that result in mature reproductive organs. घ(d) Continuous maturation of somatic cells alongside sexual differentiation.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

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     टिप्पणी जाँचपछि मात्र देखिन्छ।