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

Which of the following statements are correct?

a. Birds have hollow bones filled with air cavities. b. Birds have a streamlined body. c. Birds have feathers for insulation. d. Hindlimbs of birds are modified into wings.

  1. Only a and b

  2. Only a, b and c

  3. Only a, b and d

  4. Only b and c

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

These three statements are correct. Birds have hollow bones filled with air cavities. They have a streamlined body. Feathers are present on them. However, statement d is incorrect. Forelimbs of birds are modified into wings.
Statement d is incorrect. Forelimbs of birds are modified into wings.

Multiple choice

Which of the following statements is/are incorrect? a. Cactus has spines on its stems to store water. b. Sweating does not occur in a camel. c. Frogs breathe through moist skin and lungs.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and c

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

This is incorrect. Adult frogs breathe through their lungs and exchange gases through their skin, and the lining of their mouths. This option is correct because all the statements are incorrect. Cactus have spines on stems as modified leaves. The fleshy stems of cactus are for storing water. Sweating does occur in a camel, although it is very less and in very hot conditions. Adult frogs breathe through their lungs and exchange gases through their skin, and the lining of their mouths.

Multiple choice

The state of inactivity adopted by desert animals during the hottest and driest season is known as

  1. besal melabolism

  2. dormancy

  3. aestivation

  4. hibernation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aestivation is a state of animal dormancy characterized by inactivity and a lowered metabolic rate, entered in response to high temperatures and arid conditions. Hibernation is the counterpart for cold conditions. Besal metabolism is a typo for basal metabolism.

Multiple choice

The protoplasm is a/an

  1. emulsion

  2. suspension

  3. colloidal complex

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

Protoplasm is considered a complex colloidal system because it consists of various organic and inorganic molecules suspended in water, exhibiting properties like the Tyndall effect and sol-gel transformation. It is not a simple emulsion or a temporary suspension.

Multiple choice

Which of the following is a type of agar, found after cutting agar gel into cubes and passing distilled water upward through the tiny cubes to wash out salts and other small molecules which diffuse out of the agar?

  1. South American White

  2. Alginic acid

  3. Agarose gel

  4. Nobel agar

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

Noble Agar is obtained by cutting agar gel into cubes and passing distilled water upward thru the tiny cubes to wash out salts and other small molecules, which diffuse out of the agar.

Multiple choice

What is common between a whale and a monkey?

  1. Both have external ears.

  2. Both have a long tail.

  3. Both have body hair throughout life.

  4. Both give birth to young ones.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Both whales and monkeys are mammals. A defining characteristic of mammals is that they are viviparous, meaning they give birth to live young ones rather than laying eggs.

Multiple choice

What is true about bats?

  1. They lay their eggs in the hollows of trees, but do not sit on them for incubation.

  2. They make use of 'echolocation' for avoiding obstacles while flying.

  3. They have toothless beaks.

  4. They have nucleated red blood cells.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bats are mammals that use echolocation to navigate and hunt in the dark. They emit high-frequency sound waves that bounce off objects, allowing them to determine the location and shape of obstacles.

Multiple choice

'Agar' is obtained from:

  1. bacteria

  2. algae

  3. fungi

  4. virus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Agar is a gelatinous substance derived from the cell walls of certain species of red algae, primarily from the genera Gelidium and Gracilaria. It is widely used as a culture medium in microbiology and as a thickening agent in food. It is not produced by bacteria, fungi, or viruses.

Multiple choice

Which one of the following is a motile unicellular organism with a single cilium and can exist as an autotrophy, as well as a saprotroph?

  1. Chlamydomonas

  2. Euglena

  3. Nostoc

  4. Oscillatoria
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Euglena is a unique unicellular organism that exhibits both plant-like and animal-like characteristics. It contains chloroplasts for photosynthesis (autotrophy) in the presence of light but can also absorb nutrients from its environment (saprotrophy) in the dark. It moves using a long, whip-like flagellum (referred to here as a cilium).

Multiple choice

Which of the following do not belong to phylum Chordata?

  1. Mammals

  2. Birds

  3. Snails

  4. Sea squirts

  5. Amphibians
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is correct. Snails do not belong to phylum Chordata. Snail belongs to Mollusca. Molluscs have soft bodies that consist of three basic parts: a foot, a visceral mass and a mantle.