Correct Answer: D. classification up to class helps identify representative diversity
Explanation:
Classification up to class trains students to connect diagnostic characters with taxonomic groups. For example, bivalves, gastropods, and cephalopods share molluscan traits but differ at class level. This MCQ belongs to the Practical zoology topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: D. echinoderms are closer to chordates than arthropods in deuterostome relationships
Explanation:
Echinoderms are deuterostomes, like chordates. Although adult echinoderms look very different, embryological traits connect them more closely to chordates than to protostomes such as arthropods. This MCQ belongs to the Comparative zoology topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: A. molluscs and annelids share trochophore larvae in many groups
Explanation:
Many molluscs and annelids share a trochophore larva, which supports their placement among lophotrochozoan protostomes. This does not mean their adult body plans are identical. This MCQ belongs to the Comparative zoology topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Arthropods and nematodes are ecdysozoans because both molt a cuticle. This molecular and developmental grouping differs from older schemes based mainly on coelom type. This MCQ belongs to the Comparative zoology topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: A. Ascaris eggs survive in contaminated soil
Explanation:
Ascaris eggs can persist in contaminated soil and infect humans when swallowed with unsafe food, water, or dirty hands. Hygiene and sanitation are essential for prevention. This MCQ belongs to the Medical importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: C. representative phyla show major body plans
Explanation:
Studying representative phyla helps students compare major invertebrate body plans, levels of organization, symmetry, body cavities, feeding modes, locomotion, and evolutionary relationships. This MCQ belongs to the Practical zoology topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: B. prepared slides help study microscopic protists
Explanation:
Prepared slides are useful for microscopic protists because they allow students to observe body shape, locomotory structures, nuclei, and parasitic stages that are difficult to see with the naked eye. This MCQ belongs to the Practical zoology topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: D. citrus butterfly larvae can damage citrus plants
Explanation:
Citrus butterfly larvae can be pests of citrus plants because they feed on leaves. This makes them economically important in agriculture, even though adult butterflies also have ecological roles. This MCQ belongs to the Economic importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Silkworms, especially Bombyx mori, produce silk fibers from their cocoons. Sericulture has major economic value in textile production. This MCQ belongs to the Economic importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: A. tapeworm infection relates to contaminated or undercooked meat
Explanation:
Some tapeworm infections are associated with eating undercooked contaminated beef or pork, depending on the Taenia species. Meat inspection and proper cooking help break transmission. This MCQ belongs to the Economic importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Liver fluke infection by Fasciola can damage the liver and bile ducts of livestock. It has economic importance because it reduces animal health, growth, and productivity. This MCQ belongs to the Economic importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Correct Answer: D. Leishmania is commonly transmitted by sand fly
Explanation:
Leishmania species are protozoan parasites transmitted by sand flies. They can cause cutaneous, mucocutaneous, or visceral disease depending on the species and host response. This MCQ belongs to the Medical importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.