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 biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

Which of the given structures of prokaryotes, resemble in composition to that of eukaryotes?

  1. Cell wall

  2. Cell membrane

  3. Ribosomes

  4. Both (2) and (3)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Both prokaryotic and eukaryotic cells have a cell membrane, a double layer of lipids that separates the cell interior from the outside environment. This double layer consists largely of specialized lipids called phospholipids.
Thus, the correct answer is 'Cell membrane.'
Multiple choice biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

Statement I : All prokaryotes have a cell wall, eukaryotes do not.
Statement II : Prokaryotes have a true nucleus, eukaryotes have a primitive nucleus.

  1. Both statement I and statement II are true and statement II is the correct explanation of statement I.

  2. Both statement I and statement II are true but statement II is not the correct explanation of statement I.

  3. Statement I is true but statement II is false.

  4. Both statement I and statement II are false.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Prokaryotes generally have a tough layer which helps to maintain the strength and rigidity of the cells known as the cell wall. All the prokaryotes do not possess cell walls such as Mycoplasma. Eukaryotes like animals lack cell walls it starts with plasma membrane while plants have a cell wall.
Prokaryotes have a primitive nucleus that lacks membrane while eukaryotes have a true nucleus that has a double membrane nucleus. Thus, the correct answer is option D.
Multiple choice biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

Prokaryotic and eukaryotic flagella differ in

  1. Type of movement and position

  2. Microtubular organisation and function

  3. Location and mode of functioning

  4. Microtubular organisation and type of movement.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Prokaryotic and eukaryotic flagella have the same function in the organism. They both are located on the cell membrane. However, they differ in their structure and dynamics. Eukaryotic flagella are microtubule-based structures. They are attached to the cell at the cell membrane by basal bodies. Prokaryotic flagella are located outside of the plasma membrane. Prokaryotic flagella show rotatory movement. Whereas eukaryotic flagella show lashing movement. The movement of prokaryotic flagella is proton-driven whereas the movement of eukaryotic flagella is ATP driven. Eukaryotic flagella show 9 + 2 microtubules arrangement.

Thus, the correct answer is option D.

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Which of the following organism has cellular level of organization?

  1. Bacteria

  2. Virus

  3. Animals

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

Bacteria are single-celled organisms that exhibit a cellular level of organization. Viruses are generally considered non-cellular, while animals and plants exhibit tissue or organ-system levels of organization.

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Homeostasis is achieved by .......... adaptation.

  1. Morphological

  2. Physiological

  3. Behavioural

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Homoeostasis is the process that helps to maintain an equilibrium between the processes or the concentration of the fluid inside and outside the body.
  • The process of homeostasis can be achieved by morphological adaptation in the form of gills or through physiological adaptation by a change in temperature or through behavioral adaptation to survive in extreme conditions. 
Thus, the correct answer is option D. 

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Which of the following is the characteristics of a living organism?

  1. Homeostasis

  2. Metabolism

  3. Adaptation

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Homeostasis is the state of steady internal conditions maintained by living things. This dynamic state of equilibrium is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits.
Metabolism is the chemical processes that occur within a living organism in order to maintain life.
Adaptation is the process of change by which an organism or species becomes better suited to its environment.
An organism shows all of the given characters. 
So the correct option is D "all of the above".
Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Plants are considered as living organism because

  1. They are capable of movement.

  2. They are capable to locomote.

  3. They can breathe.

  4. Both A and C.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

As a response to external stimuli, the plants show movement. For eg. plants tend to move towards the source of light, this is positive phototropism. It is prominently seen in sunflower. It also shows hydrotropism in the roots.

It is proved experimentally that plants can breathe. The basic principle of breathing includes the exchange of gases. It is seen that plants absorb carbon dioxide and release oxygen.
So the correct option is D "both A and C."

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

The living and non-living things can be distinguished by 

  1. The living things cannot move

  2. The living things need food

  3. The living things cannot perform respiration

  4. Both B and C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The living things require energy for all basic activities like respiration, movement, reproduction. This energy is obtained by break down of food, therefore, living things need food. But non-living things do not require such energy thus they do not need food.
Hence correct option is B "The living things need food".
Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

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

  1. the efficiency of muscles in large animals is less than in small animals

  2. it is easier to carry small body weight

  3. smaller animals have a higher metabolic rate
  4. small animals have a lower $O _2$ requirement.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Metabolic rate is directly proportional to the size of an animal. Larger the animal, lower is the metabolic rate.
Small animals can run uphill than a large animal because of their fast metabolic rate.
So, the correct option is 'smaller animals have a higher metabolic rate'
Multiple choice zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

Sexual dimorphism is distinct in

  1. Hydra

  2. Earthworm

  3. Sponge

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

Sexual dimorphism is the differences in appearance between males and females of the same species. The adult males have full wings covering their body, while females have only tiny wing stubs, their tegmina (forewings) being around a fourth of their body length.
Therefore, the correct answer is option D.

Multiple choice biology concept of life theories of the origin of life origin of life the origin of cells and cell division

First life consisted of.

  1. Protovirus

  2. Provirus

  3. Bacteria

  4. Virus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
According to protovirus theory, first life consists of protovirus. It was given by Temin in 1971. It explained that a region of DNA in a cell transcribed into RNA then the RNA is copied back into DNA which can become integrated in the genome either of the original cell or other cells in the body, or both. It can function like gene amplification and cellular differentiation.

So the correct answer is 'Protovirus'.
Multiple choice biology concept of life theories of the origin of life origin of life the origin of cells and cell division

Following are the two statements about the origin of the life :
(a) The earliest organisms that appeared on the earth were nongreen and presumably anaerobic.
(b) The first autotrophic organisms were the chemoautotrophic that never released oxygen. 
Of the above statements which one of the following options is correct?

  1. Both (a) and (b) are false.

  2. (a) is correct but (b) is false.

  3. (b) is correct but (a) is false.

  4. Both (a) and (b) are correct.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The first organisms were indeed anaerobic heterotrophs that lived in a reducing environment. The first autotrophs were chemoautotrophs, which derived energy from inorganic chemical reactions without releasing oxygen.