Competitive Exams: Zoology MCQs (Practice-Test 42 of 112)

  1. Which one among the following is a mammal with least number of diploid set of chromosomes?

    1. Dog

    2. Rhinoceros

    3. Barking deer

    4. Red deer

  2. Who of the following has given the Yshaped two-channel energy flow model consisting of grazing and detritus food chains?

    1. Clements

    2. Hardin

    3. Odum

    4. Tansley

  3. Similar environment in different continents produce similar type of ecosystems. Species occupying similar ecological niche in such disjunct ecosystems are known as

    1. Ecological guilds

    2. Ecological equivalents

    3. Ecotypes

    4. Ecological indicators

  4. The grazing pathway of energy flow is relatively more important than the detritus pathway in

    1. grassland ecosystem

    2. tropical forest ecosystem

    3. pond ecosystem

    4. marine ecosystem

  5. A taxon facing an extremely high risk of extinction in the wild in the immediate future is regarded as

    1. critically endangered

    2. endangered

    3. vulnerable

    4. near threatened

  6. Consider the following characteristics:

    1. Loss of hair on the skin

    2. Loss of sweat glands

    3. Presence of thich blubber

    4. Presence of swim bladder

    In Cetacea, due to aquatic mode of life, which of the above are the adaptations that have taken place?

    1. 1, 2 and 3 only

    2. 2, 3 and 4 only

    3. 1, 2 and 4 only

    4. 1, 3 and 4 only

  7. The area over which an individual animal roams during the course of its usual daily wandering and in which it spends most of its time is called

    1. Nesting territory

    2. Home range

    3. Mating territory

    4. Feeding range

  8. Consider the following amino adds:

    1. Arginine

    2. Alanine

    3. Histidine

    Which of the above amino acids are polar in nature?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  9. In which one of the following is found a single eustachian opening in the middle of roof behind internal nares?

    1. Frog

    2. Lizard

    3. Pigeon

    4. Rabbit

  10. Consider the following statements:

    1. The eyeball of rabbit is moved in the orbit by four sets of muscles and the eyeball of frog is moved by three sets of muscles

    2. The pecten in the eye is more developed in diurnal birds than in nocturnal birds.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  11. The hormone cortisone is a

    1. carbohydrate

    2. fatty acid

    3. polypeptide

    4. steroid

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

      • Pineal body
      • Dopamine
      • Leydig cells
      • Androgen
      • Intestine
      • Secretin
      • Neurohypophysis
      • Oxytocin
  13. In the eye of lizards, a vascular pigmented cushion like body arises from the blind spot region of retina and projects into vitreous humor. It is commonly called

    1. Organ of Jacobson

    2. Organ of Corti

    3. Conus papillaris

    4. Macula dense

  14. In which one of the following is found Foramen Pannizzae?

    1. Frog

    2. Lizard

    3. Pigeon

    4. Rabbit

  15. In the placenta of some animals, like cats and dogs, the villi are developed in the form of a belt or girdle like band around the middle of their blastocyst or chorionic sac, which is more or less elliptical in shape. Such placentae are called

    1. Zonary

    2. Diffuse

    3. Discoidal

    4. Cotyledonary