Competitive Exams: Zoology MCQs (Practice-Test 88 of 112)

  1. Variation is considered as the raw material for evolution. Which of the following is/are important for generating variation in a population and thereby helping the evolutionary process?

    1. Some organisms in a population develop variable, characters due to malnutrition.

    2. Another group of organisms develops different characters due to aging.

    3. Still some others show uncommon characters resulting from recombination of genes during meiosis.

    Select the correct answer using. The codes given below:

    1. 1 and 2

    2. 2 and 3

    3. 2 alone

    4. 3 alone

  2. Which one of the following statements best explains the evolutionary advantage of meiosis?

    1. Genetic recombination's are possible from generation to generation

    2. Meiosis alternates with mitosis from generation to generation

    3. The same genetic system is passed pm from generation to generation

    4. Meiosis is necessary for sexual reproduction

  3. Which one of the following pairs is not correctly matched?

      • Cursorial adaptations
      • Limb bones elongated
      • Fossorial Adaptations
      • Developed shoulder girdle
      • Arboreal adaptations
      • Webbed feet
      • Volant adaptations
      • Fusion of certain bones
  4. The term ‘hot dilute soup’ has been used while explaining the theory of

    1. Special creation

    2. Chemical evolution

    3. Spontaneous generation

    4. Panspermia

  5. Anti-human serum was mixed separately with blood of cat, monkey and gorilla in a definite proportion. It led to precipitin reaction, but the degree of reaction varied. The degrees of precipitin reaction are such that

    1. Cat > monkey > gorilla

    2. Monkey > gorilla > cat

    3. Gorilla > cat > monkey

    4. Gorilla > monkey > cat

  6. Match list-I (Zoological names) with List-II (Common names) and select the correct answer:

    List-I List-II
    1. Stophilus oryzae

    2. Trogoderma granarium

    3. Tribolium castaneum

    4. Plodia interpunctella

    1. Rice weevil

    2. Khapra beetle

    3. Flour beetle

    4. Indian meal moth

    • A
    • B
    • C
    • D
      • 2
      • 3
      • 4
      • 1
      • 2
      • 3
      • 1
      • 4
      • 1
      • 2
      • 4
      • 3
      • 1
      • 2
      • 3
      • 4
  7. Which of the following damage symptoms are the characteristic features of the injury caused by the top shoot borer, scirpophaga (Tryporiza) nivella?

    1. Bunchy top.

    2. Presence of gun shot holes.

    3. Dead heart.

    4. Lodging of plant.

    Select the correct answer using the codes gives below:

    1. 1 and 4

    2. 1 and 2

    3. 1, 2 and 3

    4. 2, 3 and 4

  8. Potentially more efficient mechanism preventing attack by insect pests to tomato or potato plans occurs by the development to a chemical defense on accumulation of a chemical substance at the would site or throughout leaves. It interferes with the specific digestive enzyme activity of the pests.

    1. Lipase activity

    2. Proteinase activity

    3. Carbohydrase activity

    4. Esterase activity

    • Assertion (A): Gene is a biological entitya heritable function detected by observing the effect of a mutation. A gene consists of all the DNA sequences necessary to produce a single peptide or RNA product.
    • Reason (R): The gene is a single, contiguous protein encoding stretch of

    DNA.

    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT a correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): After the addition of the last amino acid to a growing polypeptide chain, the protein synthesis terminates.
    • Reason (R): The terminator codon interacts with release factor (s) and the resultant RF-terminator codon-ribosome complex effectively blocks further chain elongation.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT a correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): The presence of contractile vacuole is very essential in amoeba.
    • Reason (R): If the excess water is not removed, amoeba would soon swell and burst.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT a correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Cicada belongs to class Insecta.
    • Reason (R): Male sings loudly by two sets of vibrating plates on fore part of abdomen.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT a correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Neopilina, discovered in 1952, is a primitive living mollusc.
    • Reason (R): Absence of shell is considered a primitive feature for a living molluscan form.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT a correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Archaeopteryx is a connecting link between reptiles and modern birds.
    • Reason (R): It possesses pneumatized bones, an avian character and opposable first toe of foot, a reptilian character and opposable first toe of foot, a reptilian character.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT a correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): The conjugation in Paramecium corresponds to crossfertilization of higher animals.
    • Reason (R): The conjugation in

    Paramecium is a process of reconstruction of nuclei involving the fusion of gametic nuclei.

    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT a correct explanation of A

    3. A is true but R is false

    4. A is false but R is true