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

Changes in structure and function of living beings is known as

  1. Adaptions

  2. Order

  3. Metabolism

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

Changes in structure and function of living beings is called as development. Development is important in an organism for in survival in the competition of nature. Development leads to adaptations that increase the chances of survival of an organism. 

So the correct option is D "development".

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?

Which of the following sets does not contain defining characteristics of living organisms?

  1. Growth and reproduction

  2. Metabolism and cellular level of organisation

  3. Response to stimuli and consciousness

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

Characters like growth, reproduction, metabolism, responsiveness to stimuli are all defining characteristics of living organisms

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

Choose the correct answers from the alternatives given .
Which of the following is characteristics of living organisms?

  1. To be organised

  2. To respond

  3. To metabolise

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Living organisms show certain characteristics that make them different from non-living. 
  • Cellular organization - Each living organism has cells as a basic unit of life. Different organelles are organized to function as a unit inside the cell.
  • Ability to response - a living organism can sense and respond accordingly to external environmental conditions or stimuli. 
  • Metabolism - Different types of chemical reactions occur inside living organisms to maintain their living state. 
All of the given options are characteristics of living organisms. 
So the correct answer is "All of these".
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?

The change that takes place in the body of the organism when a stimulus is provided is known as 

  1. Adaptation

  2. Response

  3. Growth

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
An adaptation is a feature that helps an organism, such as a plant or animal, survive in its environment.
A response can be defined as any change in the behavior of a living organism that results when an external or internal stimulus is provided. Growth is an irreversible, permanent increase in the size of an organ or its parts or even of an individual cell.
So, the answer is B.
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

Which is incorrect about protobionts in abiogenic origin of life ?

  1. They were partially isolated from surroundings

  2. They could maintain an internal environment

  3. They were able to reproduce

  4. They could separate combination of molecules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Protobionts were prebiotic chemical aggregates that could maintain an internal environment, separate molecules, and show partial isolation from surroundings, but they lacked genetic material and mechanisms for true reproduction. Therefore, the statement that they were able to reproduce is incorrect.

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.

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

Choose the correct answers from the alternatives given.
Which of the following live in habitats much like those of the early Earth?

  1. Protozoans

  2. Eubacteria

  3. Archaebacteria

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

The fossil shapes almost 3.5 billion years ago, identify them as archaea.

So, the correct option is 'Archaebacteria'.

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

Which of the following statements is true?

  1. True cell evolved before the protocell

  2. Prokaryotes evolved before eukaryotes

  3. Eukaryotes evolved before prokaryotes

  4. Prokaryotes didnt evolve until 1.5 billion years ago
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Scientists have concluded that prokaryotic life forms preceded the more complex eukaryotes. 
  • All organisms on Earth are classified into two basic cell types. "Kary" means nucleus, "Pro" means "before," and prokaryotes have DNA in a freely floating ring that is not encased in a nucleus. 
  • "Eu" means "true," and eukaryotes have DNA arranged in chromosomes and encased in a nucleus. 
  • Fossil evidence indicates that prokaryotic cells first existed on the earth, prior to the arrival of the eukaryotes. 
  • Though they lack skeletons, a few groups of single-celled organisms have hard portions or secrete hard shells and so appear in the fossil record. 
  • This record is the best indication of prokaryotes' and eukaryotes' relative ages.
So the correct option is 'prokaryotes evolved before eukaryotes'.