Biology · Science General

Diversity in Living Organisms

3,323 Questions

The diversity in living organisms deals with the classification of life forms into various kingdoms and phyla. This topic covers specific traits of bacteria, animal body cavities, and structural adaptations for survival. These fundamentals are crucial for biology sections in medical entrance and state board exams.

Animal phyla characteristicsBacteria and flagellaBiological adaptationsKingdom Animalia classificationBody cavity typesExtinct organism subphylaJawless animals identification

Diversity in Living Organisms Questions

Multiple choice

Ambulacral system is found in _______.

  1. Starfish

  2. Hydra

  3. Earthworm

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The water vascular system, or ambulacral system, is a unique network of water-filled canals found in echinoderms like the starfish, used for locomotion and feeding.

Multiple choice

Metamerism is a characteristic feature of

  1. annelida

  2. chordata

  3. mollusca

  4. nematoda
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Metamerism, or true segmentation, is a defining characteristic of the phylum Annelida. It involves the repetition of organs and tissues along the body axis.

Multiple choice

Air sacs of the birds

  1. facilitate blood circulation

  2. keep body warm

  3. reduce body weight

  4. maintain body temperature
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Correct Answer: reduce body weight

Multiple choice

Which type of cleavage is exhibited by reptiles?

  1. Discoidal

  2. Radial

  3. Spinnal

  4. Superficial
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Reptiles have telolecithal eggs with a large amount of yolk, which restricts cleavage to a small disc of cytoplasm at the animal pole, known as discoidal cleavage.

Multiple choice

Neopilina is the connecting link between

  1. Annelida and Arthropoda

  2. Annelida and Mollusca

  3. Platyhelminthes and Annelida

  4. Mollusca and Echinodermata
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Neopilina is a monoplacophoran mollusk that exhibits segmented body structures, which is a characteristic feature of annelids. Therefore, it serves as a connecting link between the phyla Annelida and Mollusca.

Multiple choice

Tasmanian Wolf is a marsupial while Wolf is a placental mammal. This shows

  1. Convergent evolution

  2. Divergent evolution

  3. Parallelism

  4. Inheritance of acquired characters
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Parallel evolution occurs when two related or similar species evolve independently in similar environments, acquiring similar adaptations. The Tasmanian wolf and the placental wolf are classic examples of this phenomenon.

Multiple choice

Which group includes homologous organs?

  1. Horns of cattle, tail of horse and teeth of mammals

  2. Fins of seal, wings of birds and forelimbs of man

  3. Wings of butterfly, flying fish and bird

  4. Tentacles of Hydra and arms of starfish
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Homologous organs share a common evolutionary origin and underlying structure, even if they perform different functions. The fins of a seal, wings of a bird, and human forelimbs all share the same pentadactyl limb structure.