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Topics in NEET Zoology
Which class of animals shows maximum biological diversity and why?
Correct Answer:
B. Insecta - due to adaptability, shorter life cycles, and diverse ecological niches
EXPLANATION
Insects represent over 80% of described animal species due to their adaptability, rapid reproduction, metamorphosis, and ability to occupy diverse ecological niches.
The development of amnion and allantois in embryos is an adaptation for:
Correct Answer:
C. Terrestrial reproduction independent of water
EXPLANATION
The amnion protects the embryo in fluid, and allantois stores waste products, allowing amniotes to reproduce on land without dependence on water.
Which of the following represents a more recent evolutionary relationship (sister group)?
Correct Answer:
B. Birds and Reptiles
EXPLANATION
Modern cladistic analysis shows birds are derived from theropod dinosaurs (reptiles), making them sister groups with a more recent common ancestor.
In the phylogenetic tree of animals, which phylum is believed to be ancestral to arthropods?
Correct Answer:
A. Annelida
EXPLANATION
Annelids and arthropods share similarities in segmentation and structure, suggesting arthropods evolved from annelid-like ancestors.