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

Microorganisms can exist as____________.

  1. unicellular

  2. multicellular

  3. cell clusters

  4. unicellular or multicellular

  5. unicellular, multicellular or cell clusters
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, it is the correct answer. Microorganisms can exist as unicellular, multicellular or cell clusters.

Multiple choice

The planktonic larvae of the king crab (Lithodes aequispinus) use which of the following types of nastic movement while swimming upwards?

  1. Thigmotaxis

  2. Thermotaxis

  3. Rheotaxis

  4. Gravitaxis

  5. Phonotaxis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gravitaxis is a response to the attraction due to gravity. The planktonic larvae of the king crab (Lithodes aequispinus) use a combination of positive phototaxis (movement towards the light) and negative gravitaxis (upward movement).

Multiple choice

Why is the shape of birds streamlined?

  1. To minimize force of friction

  2. To increase force of friction

  3. To overcome gravitational force

  4. To protect themselves from the ill effects of sunlight
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Birds evolved streamlined bodies to minimize air resistance (friction) during flight, making movement more efficient. Increasing friction would make flight harder, while body shape is unrelated to overcoming gravity or protection from sunlight.

Multiple choice

Bats can fly in the dark because of ______.

  1. clipped wings

  2. ultrasonics

  3. anti-gravitational pull

  4. partial displacement of air
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bats navigate and hunt in darkness using echolocation. They emit high-frequency ultrasonic squeaks (typically 20-100 kHz) beyond human hearing, and detect the echoes that bounce back from objects. This gives them precise spatial awareness even in complete darkness.

Multiple choice

Bats can fly on the dark without hitting objects because ______.

  1. they are flying mammals

  2. their night vision is good

  3. they are guided by ultrasonic waves which they produce

  4. of no scientific reason
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bats possess a sophisticated biological sonar system called echolocation. They emit ultrasonic pulses through their mouth or nose, and analyze the returning echoes to create a mental map of their surroundings. This allows precise navigation and detection of prey in complete darkness.

Multiple choice

The pigment haemocyanin is found in

  1. mollusca

  2. echinodermata

  3. chordate

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

Haemocyanin is a copper-based respiratory pigment found primarily in molluscs (such as snails, octopus, and clams) and some arthropods. Unlike haemoglobin (iron-based in vertebrates), haemocyanin is blue when oxygenated and colorless when deoxygenated.

Multiple choice

What is Allen’s rule?

  1. Birds of colder regions tend to have narrower wings than those of warmer regions.

  2. Fish found in cold waters tend to have more vertebrae than those found in warm waters.

  3. Mammals, birds and insects found in tropical regions are darker in colour than those found in arctic regions.

  4. Mammals and birds of colder regions are larger in size than those of warmer regions.

  5. Mammals living in cold regions tend to have shorter ears and limbs than those found in warm areas.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Mammals living in cold regions tend to have shorter ears and limbs than those found in warm areas. This is known as Allen’s rule.