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Animal Kingdom · Question 49

NEET 2016 (Phase 1)MCQMedium📈 Topic in 12% papers+4−1
1

Which of the following features is not present in Periplaneta americana?

  1. Indeterminate and radial cleavage during embryonic development
  2. Schizocoelom as body cavity
  3. Metamerically segmented body
  4. Exoskeleton composed of N-acetylglucosamine

Answer

(1) Indeterminate and radial cleavage during embryonic development

Solution

Periplaneta americana (cockroach) belongs to phylum Arthropoda.

As per NCERT, arthropods are bilaterally symmetrical, triploblastic, segmented and coelomate animals with a chitinous exoskeleton.

⇒ Body is metamerically segmented ✓; coelom is a schizocoelom (protostome) ✓; chitin is a polymer of N-acetylglucosamine ✓.

∵ Protostomes show determinate and spiral cleavage, while indeterminate and radial cleavage is a feature of deuterostomes (echinoderms, chordates).

∴ Indeterminate and radial cleavage is not present in Periplaneta americana.

Answer: (1)

NEET 2016 (Phase 1)

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2

Choose the correct statement

  1. All mammals are viviparous.
  2. All cyclostomes do not possess jaws and paired fins.
  3. All reptiles have a three-chambered heart.
  4. All pisces have gills covered by an operculum.
NEET 2016 (Phase 2)
3

Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of Phylum

  1. Mollusca
  2. Protozoa
  3. Coelenterata
  4. Porifera.
AIPMT 2015
4

Metagenesis refers to

  1. occurrence of a drastic change in form during post-embryonic development
  2. presence of a segmented body and parthenogenetic mode of reproduction
  3. presence of different morphic forms
  4. alternation of generation between asexual and sexual phases of an organism.
AIPMT 2015
5

A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is

  1. Neomyxine
  2. Petromyzon
  3. Eptatretus
  4. Myxine
AIPMT 2015
6

Which of the following endoparasites of humans does show viviparity?

  1. Trichinella spiralis
  2. Ascaris lumbricoides
  3. Ancylostoma duodenale
  4. Enterobius vermicularis
AIPMT 2015 (Cancelled)
7

Which of the following represents the correct combination without any exception? (Characteristics – Class)

  1. Sucking and circular mouth; jaws absent, integument without scales; paired appendages. – Cyclostomata
  2. Body covered with feathers; skin moist and glandular, forelimbs form wings; lungs with air sacs. – Aves
  3. Mammary gland; hair on body; pinnae; two pairs of limbs. – Mammalia
  4. Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord. – Chondrichthyes
AIPMT 2015 (Cancelled)
8

Which of the following animals is not viviparous?

  1. Platypus
  2. Whale
  3. Flying fox (Bat)
  4. Elephant
AIPMT 2015 (Cancelled)
9

Which of the following characteristics is mainly responsible for diversification of insects on land?

  1. Exoskeleton
  2. Eyes
  3. Segmentation
  4. Bilateral symmetry
AIPMT 2015 (Cancelled)
10

Select the taxon mentioned that represents both marine and fresh water species.

  1. Echinoderms
  2. Ctenophora
  3. Cephalochordata
  4. Cnidaria
AIPMT 2014
11

Which one of the following living organisms completely lacks a cell wall?

  1. Cyanobacteria
  2. Sea-fan ( Gorgonia)
  3. Saccharomyces
  4. Blue-green algae
AIPMT 2014

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