Biology · Science General

Diversity in Living Organisms

3,829 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

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.

Multiple choice

Pick out the FALSE statement regarding the care of eggs by animals.

  1. Female cyclops carries its eggs in the ovisacs.

  2. Female midwife toad carries its eggs on the thighs.

  3. Male hippocampus carries its eggs in its brood pouch.

  4. Female dusky salamander carries its egg cluster packed around neck.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

No, the male midwife toad carry their eggs on thighs (hind limbs).

Multiple choice

Which of the following characterstics indicates that a cell is prokaryotic?

  1. The cell has vacuoles.

  2. An organised nucleus is absent.

  3. Membrane bound cell organelles are present.

  4. Two to several DNA molecules are present.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

No nucleus is present in a prokaryotic cell and hereditary material lies free in cytoplasm. In eukaryotic cell, an organised nucleus is present.

Multiple choice

Which of the following phenomena do bats and dolphins follow to search for their prey?

  1. Refraction of sound

  2. Smell of blood

  3. Scattering of sound

  4. Echo location

  5. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Echolocation is the system bats and marine mammals use to navigate in the dark when hunting prey. Equivalent to sonar or radar, echolocation is the production of sound used for communication. Echolocation is the use of ultra-high frequency sounds for navigation and locating prey.

Multiple choice

Which of the following feature do birds have due to which they are able to swim in water?

  1. Webbed feet

  2. Broad wings

  3. Long beaks

  4. Toes with claws

  5. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Webbed feet or toes have a piece of skin between the toes. Sea fowl is the name for birds with webbed feet that are frequent visitors to the coast and the open ocean. These birds include seagulls, pelicans, and albatross. These birds can also be called sea birds, or aquatic birds.

Multiple choice

Fill blank (iii).

Directions: Read the following passage having some numbered blanks.

Pigeon is a working bird. Carrier pigeons are trained to carry messages to people. The note is placed into a small skinny can, and then it is tied to the pigeon’s leg. Pigeons are good messengers because they are fast and can fly long distances. They also can reach places that people can’t. From high up in the __(i)__, specially trained pigeons can __(ii)__ orange coloured life jackets in the ocean, as __(iii)__ it is difficult for humans to spot people at __(iv)__, especially in bad __(v)__.

  1. many times

  2. anytime

  3. every time

  4. sometimes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sometimes means 'on some occasions'. It fits the context here. 

Multiple choice

Plants like ______, algae and fungi exhibit symbiotic relationship.

  1. lichen

  2. virus

  3. bacteria

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

Lichens are composite organisms formed from a symbiotic partnership between fungus and algae (or cyanobacteria). The fungal partner provides structure while the photosynthetic partner produces food through photosynthesis.

Multiple choice

Which of the following pairs belongs to the same type?

  1. Euglena and paramecium

  2. Bacteria and fungi

  3. Blue green algae and euglena

  4. Paramecium and bacteria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Yes, this is correct as this is the only pair in which both are eukaryotes. Their cells have a well organized nucleus.