Biology · Science General

Diversity in Living Organisms

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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 component of the cell cell and cell organelles cell organelles cell: the unit of life biology cell as structural and functional unit basics of cell

Which of the following is an incorrect statement about the possible endosymbiotic origin of chloroplasts and mitochondria?

  1. They are of appropriate size to be descendants of bacteria

  2. They contain their own genome and produce all their own proteins

  3. They contain circular DNA molecules not associated with histones

  4. Their membranes have enzymes and transport systems that resemble those found in the plasma membranes of prokaryotes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The endosymbiotic theory states that mitochondria and chloroplasts were once free-living prokaryotes. While they have their own genome, they do not produce all their own proteins; many have been transferred to the host nucleus.

Multiple choice bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

How many features listed below are exhibited by flatworms (A) and bacteria (B)?


(i) Growth by increases in mass only
(ii) Regeneration
(iii) Self-consciousness
(iv) Anabolism and catabolism
(v) Binary fission

  1. A - (i,ii,iii,iv) B- (i, iii, iv)

  2. A - (ii,iv) B- (iv, v)

  3. A - (ii,iii,iv) B- (i, iv, v)

  4. A - (i,ii) B- (iii, iv, v)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Flatworms exhibit regeneration and anabolism/catabolism. Bacteria exhibit anabolism/catabolism and binary fission. Growth by mass and self-consciousness are not universal to these groups in the context of these specific biological definitions.

Multiple choice bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

It is much easier for a small animal to run uphill than for a large animal, because - ?

  1. small animals have lower $O _2$ requirement

  2. the efficiency of muscles in larger animal is less than in smaller animal

  3. it's easier to carry a small body weight

  4. smaller animals have higher metabolic rate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
It has been observed that the metabolic rate of an organism is inversely proportional to its body weight, that is smaller animals have a higher metabolic rate. This higher metabolic rate allows them to have higher energy and are quicker in climbing heights as compared to larger animals.

So, the correct answer  is 'smaller animals have higher metabolic rate'.
Multiple choice physics medical imaging ultrasonic sound using ultrasound in medicine ultrasound and its applications

The technique used by bats to find their way or to locate food is ______.

  1. SONAR

  2. RADAR

  3. Echolocation

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

Bats can produce ultrasonic waves by flapping their wings.
They can also detect these waves.these waves produced by the bats after reflection from the obstacles like building guide them to  remain away from the obstacles during night with the help of ultrasonic waves.

Multiple choice physics medical imaging ultrasonic sound using ultrasound in medicine ultrasound and its applications

By what bats understands position and type of prey of any obstacle in way?

  1. By detecting reflection of ultrasonic sound

  2. By detecting refraction of ultrasonic sound

  3. By detecting reflection of infrasonic sound

  4. By detecting deflection of infrasonic sound
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

By detecting reflection of ultrasonic sound bats understands position and type of prey of any obstacle in way

Multiple choice botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals

Which of these is a multicellular organism?

  1. Amoeba

  2. Paramoecium

  3. Human beings

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Amoeba is a single-celled eukaryotic organism that moves by the means of pseudopodia.
B. Paramoecium is a unicellular eukaryotic organism. It is a ciliate.
C. Human beings are the multicellular primates, scientifically known as Homo sapiens.
So, the correct answer is 'Human beings'.
Multiple choice botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals

Which one from the following is an example of multicellular organism?

  1. Chlamydomonas

  2. Bacteria

  3. Snake

  4. Amoeba
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The cell is the structural unit of life. Unicellular organisms are made up of one cell that performs all the functions e.g., bacteria, amoeba, Chlamydomonas. Whereas, multicellular organisms are made up of numbers of cells and a differnt group of cells perform a different function to maintain life. Snake is an example of the multicellular eukaryotic organism.
Multiple choice botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals the cell structure cytoplasm cell parameters

Which of following organisms can be seen only under the microscope?

  1. Unicellular

  2. Multicellular

  3. Vertebrates

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Most unicellular organisms are of microscopic size and are thus classified as microorganisms, for example, Phytoplankton and protozoa range from about 0.001 mm to about 0.25 mm.
  • Most of the multicellular organisms and vertebrates are visible to the naked eye, which means that it is possible to view them without using the microscope.
    So, option A is the correct answer.
Multiple choice biology skeleton and joints introduction to movement introduction to locomotion movement

What evidence convinced scientists that Archaeopteryx should be classified as a bird rather than a small dinosaur?

  1. Scales.

  2. Toothless, elongated mouth like beak.

  3. A tail similar to that of modern birds.

  4. Fused collar bone, indicating flying ability.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Archaeopteryx is considered a transitional fossil. The presence of a fused collar bone (furcula) is a key avian characteristic associated with the mechanics of flight, distinguishing it from typical small dinosaurs.

Multiple choice zoology skeleton and movements introduction to movement introduction to locomotion movement

Which of the following statements is not true ?

  1. The cartilage is not as hard as bones.

  2. A snake moves by making loops.

  3. All animals show exactly similar movements.

  4. Snails move with the help of their muscular feet.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
All animals do not show exactly similar movements.
Animal movements are usually based on their habitat. Different animals have different organs for locomotion. For example, Snakes crawl by forming loops while birds fly with their wings. 
Multiple choice zoology skeleton and joints introduction to movement introduction to locomotion movement

Which of the following features is common to all animals without any exception?

  1. Locomotion

  2. Specialised nervous system

  3. Multicellularity

  4. Herbivorous mode of nutrition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Locomotion is the active movement i.e. with consumption of energy shown by all organism. Need, type and extent of locomotion differ from organisms to organism based on their organisation. 
  • The specialised nervous system is seen in only organisms with organ system level of organisation. 
  • Several organisms are unicellular, hence multicellularity is not a common feature of all organisms. 
  • All organisms differ in their mode of nutrition. They can be autotrophic or heterotrophic. If heterotrophic, they can be herbivores, carnivores or omnivores.
  • So, the correct option is 'Locomotion'.
Multiple choice zoology skeleton and joints introduction to movement introduction to locomotion movement

The amoeboid movements result from_____________.

  1. Interaction among actin, myosin, and ATP

  2. Coordinated beats of cilia

  3. Whip-like action of flagella

  4. Action by the mitotic spindle, similar to what happens during mitosis and meiosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Interaction among actin, myosin and ATP

The amoeba uses two mechanically distinct mechanisms to push itself forward a filopodia - lamellipodia mechanism that depends on action polymerisation and a bleb mechanism in which a local region of membrane where the cortical - cytoplasmic pressure generated by myosin. 

Multiple choice zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

The masses of bacteria held together by slime and fungal filaments to form mesh like structures are called as

  1. primary sludge

  2. flocs

  3. activated sludge

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

Physical removal of particles by filtration and sedimentation. Then the grit is removed by sedimentation. All solids that settle form the primary sludge and the supernatant forms the effluent. The primary effluent is passed into large aeration tanks where it is constantly agitated mechanically and the air is pumped into it. This allows vigorous growth of useful aerobic microbes into flocs (masses of bacteria associated with fungal filaments to form mesh-like structures).

So the correct option is "flocs".