A three-point testcross in Drosophila yields recombinant classes with lower frequencies than parental classes. This demonstrates:

The correct answer is B: Linkage and crossing over between genes. Lower recombinant frequencies indicate genes are linked but can undergo crossing over, producing recombinants at lower frequencies than parentals.

Which of the following STIs is most commonly associated with pelvic inflammatory disease (PID)?

The correct answer is B: Chlamydia trachomatis. Chlamydia trachomatis is the leading cause of PID, accounting for 30-40% of cases. Neisseria gonorrhoeae is the second most common cause.

What is the most common sexually transmitted infection (STI) affecting reproductive health in India as per 2024 data?

The correct answer is D: HPV. HPV (Human Papillomavirus) is the most prevalent STI globally and in India, with significant links to cervical cancer and reproductive complications.

In the auditory system, how does the cochlea convert sound vibrations into neural signals?

The correct answer is B: Vibrations move perilymph, bending hair cells on basilar membrane. Stapes vibrations move perilymph in the cochlea, causing basilar membrane displacement and stereocilia bending on hair cells, generating action potentials.

In a pyramid of numbers, why would an inverted pyramid occur in certain ecosystems?

The correct answer is A: When producers are larger than consumers. Inverted pyramids occur when individual organisms at lower trophic levels are larger (e.g., one tree supporting many insects).

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NEET Zoology
Animal Kingdom

Zoology questions for NEET UG — Animal Kingdom, Human Physiology, Genetics, Evolution.

26 Q 6 Topics Take Mock Test

Difficulty: All Easy Medium Hard 21–26 of 26

Topics in NEET Zoology

All Animal Kingdom 100 Human Physiology 100 Genetics & Evolution 100 Reproductive Health 100 Ecology & Environment 100 Biotechnology & Applications 40

Q.21 Easy Animal Kingdom

Which of the following organisms shows radial symmetry in its adult form?

A Starfish

B Earthworm

C Butterfly

D Fish

Correct Answer: A. Starfish

EXPLANATION

Starfish (Echinodermata) exhibits radial symmetry in adults, while earthworms show bilateral symmetry. Butterflies and fish are bilaterally symmetric.

Test

Q.22 Easy Animal Kingdom

Which class of vertebrates is characterized by the presence of feathers and air sacs?

A Mammalia

B Aves

C Reptilia

D Amphibia

Correct Answer: B. Aves

EXPLANATION

Birds (Aves) uniquely possess feathers for insulation and flight, along with air sacs for efficient respiration.

Test

Q.23 Easy Animal Kingdom

The water vascular system is unique to which phylum?

A Mollusca

B Arthropoda

C Echinodermata

D Chordata

Correct Answer: C. Echinodermata

EXPLANATION

Echinoderms (starfish, sea urchins) possess a characteristic water vascular system used for locomotion and feeding.

Test

Q.24 Easy Animal Kingdom

Which phylum contains animals with a true coelom and closed circulatory system?

A Platyhelminthes

B Annelida

C Nematoda

D Porifera

Correct Answer: B. Annelida

EXPLANATION

Annelida (earthworms, leeches) are characterized by a true coelom and closed circulatory system with blood vessels.

Test

Q.25 Easy Animal Kingdom

Cnidarians are characterized by the presence of:

A Nematocysts and radial symmetry

B Tube feet and bilateral symmetry

C Jointed legs and exoskeleton

D Notochord and dorsal nerve cord

Correct Answer: A. Nematocysts and radial symmetry

EXPLANATION

Cnidarians (jellyfish, corals, sea anemones) possess nematocysts (stinging cells) and exhibit radial symmetry, which is their defining characteristic.

Test

Q.26 Easy Animal Kingdom

Which of the following is the correct hierarchical classification of animals?

A Kingdom → Phylum → Class → Order → Family → Genus → Species

B Kingdom → Class → Phylum → Order → Family → Genus → Species

C Kingdom → Phylum → Order → Class → Family → Genus → Species

D Phylum → Kingdom → Class → Order → Family → Genus → Species

Correct Answer: A. Kingdom → Phylum → Class → Order → Family → Genus → Species

EXPLANATION

The correct taxonomic hierarchy from largest to smallest grouping is Kingdom, Phylum, Class, Order, Family, Genus, and Species (KPCOFGS).

Test

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Animal Kingdom