Zoology MCQs for NEET — Practice Questions with Answers

To correctly match the pairs:

Ascaris (p) is a Roundworm, so it matches with (ii).

Wuchereria (q) is a Filaria worm, so it matches with (iv).

Ancylostoma (r) is a Hookworm, so it matches with (i).

Tapeworm (s) is a Flatworm, so it matches with (iii).

Thus, the correct matching is:

p - (ii), q - (iv), r - (i), s - (iii)

In annelids, the neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord. This ventral nerve cord runs along the length of the body and is a characteristic feature of the annelid nervous system.

Parapodia are paired, fleshy protrusions found in some annelids (e.g., polychaetes) that aid in movement and swimming. They function as lateral paddles, helping the organism to swim through water.

Arthropoda is the largest phylum in the animal kingdom. It includes insects, arachnids, myriapods, and crustaceans, which together comprise the most diverse and numerous group of animals on Earth.

The exoskeleton of arthropods is made of chitin, a long-chain polymer that provides both strength and flexibility. This chitinous exoskeleton serves as a protective barrier and provides structural support.

Echinodermata (e.g., starfish) exhibit a unique characteristic where adults show radial symmetry, while their larvae exhibit bilateral symmetry. This transition during development is a key feature of this phylum and helps in distinguishing it from others.

Starfish (Echinodermata) do not have a specialized excretory system. Instead, they excrete waste through diffusion across their body surfaces and through structures called tube feet. This is different from organisms like sepia (cuttlefish), crabs, and earthworms, which have more specialized excretory systems.

In Hemichordata, the circulatory system is open, respiration occurs through gills, and the excretory system includes a proboscis gland. This aligns with the option I = circulatory system - open, II = Respiration - gills, III = Excretory system - proboscis gland.

Vertebrates can have a variety of heart structures depending on the subgroup. Fishes typically have a 2-chambered heart, amphibians and reptiles (except crocodiles) have a 3-chambered heart, and birds and mammals have a 4-chambered heart. Therefore, the correct option is 'All above'.