Biology · Science General

Evolution and Biological Adaptation

1,288 Questions

Evolution and biological adaptation focus on natural selection, speciation events, and how organisms adjust to environmental changes over time. These foundational biology concepts appear frequently in general science sections of civil services and school board examinations. Use these questions to study evolutionary theories, ancestral traits, and the fossil record.

Natural selection mechanismsSpeciation event examplesBiological adaptation traitsPanspermia hypothesis conceptsFossil record analysisMate selection theories

Evolution and Biological Adaptation Questions

Multiple choice zoology evolution evidences for evolution - taxonomy, molecular biology and cytology evidences of evolution evidences of biological evolution

Origin of life is also termed as 

  1. Biogenesis

  2. Abiogenesis

  3. Protobiogenesis

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

The origin of life, specifically the transition from non-living matter to the first living entities, is scientifically referred to as protobiogenesis or abiogenesis (though protobiogenesis is more specific to the early stages).

Multiple choice zoology evolution evidences for evolution - taxonomy, molecular biology and cytology evidences of evolution evidences of biological evolution

Forelimbs of mammals have a common basic structure or pattern but are different in their usage/function in different animals. They can be called 

  1. Homologous organs

  2. Analogous organs

  3. Vestigial organs

  4. Rudimentary organs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Homology indicates common ancestry. Homologous organs have similar structure but different functions. Example: Forelimbs of bat, cheetah, whales and human have similar structure but different functions.
Analogy indicates diverse ancestry. Analogous organs have different structure but perform similar functions. Example: Wings of butterfly and birds are different in structure but perform similar function.
Multiple choice zoology evolution evidences for evolution - taxonomy, molecular biology and cytology evidences of evolution evidences of biological evolution

Choose the correct answers from the alternatives given .
Which one of the following promotes similarity among living things?

  1. Adaptation

  2. Natural selection in different environments

  3. Inheritance from a common ancestor

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

A common belief in evolution is the unity in the organisation of the organisms at various levels is due to descent from a common ancestor.

So, the correct option is 'Inheritance from a common ancestor'.

Multiple choice zoology evolution evidences for evolution - taxonomy, molecular biology and cytology evidences of evolution evidences of biological evolution

State whether the following statements are true or false:
Somatic variations form the basis of evolution.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Somatic variations are not inherited. These are variations in somatic cells. While genetic variations are inherited and are due to variation of DNA from germ cells. These genetic variations form the basis of evolution.

Hence, the correct answer is 'False'.

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 evs - i growth and personality development heredity and other supporting factors for development all together community work and its importance

Cats produces cats. This statement is an explanation for

  1. Heredity

  2. Evolution

  3. Ontogeny recapitulates phylogeny

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cats produces cats. This statement indicates the inheritance of characters from the parents to offspring. Genes are the fundamental unit which carries the characters from one generation to the other. This tendency of inheritance of genotypic and phenotypic character is known as heredity.

Multiple choice zoology evolution examples of natural selection selection natural selection

Individuals with better traits for the new environment have more offspring. The given statement can be related to which of the following phenomena?

  1. Noe-Lamarckism

  2. Gene drift

  3. Natural selection

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

The theory of natural selection was given by Darwin. According to the law of natural selection, nature supports the survival of the fittest. It means that, the individual which is better adapted to the environment, will survive and produce new individual. So, the correct option is C.

Multiple choice zoology evolution examples of natural selection selection natural selection

Darwin's finches are an example of 

  1. Genetic variation

  2. Adaptive radiation

  3. Convergent evolution

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Darwin observed amazing diversity among the creatures which originated from a particular geographical area and radiated to the other habitat. The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands is considered as an example of adaptive radiation and serves as an evidence for an origin of species by natural selection.

Thus, the correct answer is option B.

Multiple choice zoology evolution examples of natural selection selection natural selection

Which of the following defines the relation between adaptive radiation and natural selection?

  1. Natural selection is usually the principle mechanism driving adaptive radiation.

  2. Natural selection leads to adaptation during adaptive radiation.

  3. Natural selection causes mutational changes during adaptive radiation.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Natural selection and adaptive radiation are related to each other. A progressive change in which organisms diversify rapidly from an ancestral species into two or more groups to adapt to the changing environment is called an adaptive radiation. Natural selection is the adaptation of the individual towards the changing environment to survive. So, natural selection is the principal mechanism driving adaptive radiation. So, the correct option is A.
Multiple choice zoology variation examples of natural selection selection natural selection

The species which were not able to adapt to their environments through genetic changes to their skeletons were not able to survive. The given statement is an example of 

  1. Skeletal Adaptations

  2. Coloration

  3. Physiological adaptations

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

The given adaptation in lizard is an example of skeletal adaptation of natural selection. According to this adaptation, the individual who didn't develop the skeletal changes died. This type of adaptation can be seen in some species (lizards, giraffes) of animals who adapted themselves to the environment through genetic changes in their skeletons. For example, development of long neck in giraffes to reach food sources of the upper part of the trees. It is said that those died who didn't develop the long neck. Another example is development of longer leg bones in lizards to help them to climb up during periods of flood and to escape predators in the ground. Those lizards who didn't develop long leg bones, died. So, the correct option is A.

Multiple choice zoology variation examples of natural selection selection natural selection

Which of the following has a natural selection as principle mechanism?

  1. Adaptive radiation

  2. Convergent evolution

  3. Genetic variation

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Principle Mechanism:-

  • Variation. Organisms (within populations) exhibit individual variation in appearance and behavior.
  • Inheritance. Some traits are consistently passed on from parent to offspring.
  • High rate of population growth.
  • Differential survival and reproduction. 
  • Adaptive radiation:- A process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, creates new challenges, or opens new environmental niches.  So,the correct answer is "Adaptive radiation".
Multiple choice zoology variation examples of natural selection selection natural selection

The animals having several adaptation and are able to adapt is given by theory of 

  1. Evolution

  2. Natural selection

  3. Variation

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Central idea of Darwinism is Natural Selection. He stated that nature selects the best-suited organisms that have a greater chance to become parents for the next generation who have adapted themselves. Thus, the correct answer is option B.

Multiple choice zoology variation examples of natural selection selection natural selection

Peacock females pick their mate according to the males tail. The ones with the largest and brightest tails mate more often. The given example can be related to

  1. Adaptive radiation

  2. Natural selection

  3. Convergent evolution

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The male peacock has a lot of showy feathers.However, peacocks use their feathers to attract peahens (female peacocks). The peacocks with the showier feathers are able to attract mates, so they are the ones that have offspring, and pass on the fancy-feather genes to the next generation.

So, the correct answer is  "Natural selection".

Multiple choice zoology variation examples of natural selection selection natural selection

Read the passage and answer the following question.

A total of 12 bird species having distinct diets, behavior, coloration and beak shapes inhabit a large volcanic island in the South Atlantic 500 miles from the Coast of Africa not found on the mainland. Two species are flightless herbivores. A bird found on the mainland is related to these bird species but it does not fly over water but can occasionally survive at sea in a storm. There are no reptiles, mammals or amphibians on the island, although there are many insect and plant species.

The evolution of two flightless bird species on the island indicates

  1. Flight improved the ability of the species to escape predators, but impaired food gathering on the ground.

  2. Flight originally evolved only to escape predators.

  3. Mimicry is a highly effective evolutionary strategy.

  4. The species had greater fitness without the ability to fly.

  5. Flight is not an effective means to escape predators.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

According to Charles Darwin, Natural selection is a tool of nature to impose the survival of the fittest. As some species fight to become the fittest, they adapt. Many organisms due to this, evolved, got adapted as they chose to survive in that habitat. Adaptation is the biggest drive to evolution and the pinpointed conclusion of the natural selection. 

So, the correct option is 'The species had greater fitness without the ability to fly'.

Multiple choice zoology variation examples of natural selection selection natural selection

The adaptation shown by the bacterium Pseudomonas for metabolization of nylon is an example of

  1. Genetic variation

  2. Natural selection

  3. Neo-Lamarckism

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pseudomonas is the genus of a bacterium. This bacterium was placed in the medium where only nylon was present. This resulted in the development of the bacterial species which was able to metabolize the nylon. The nylon was the only source of food available so, the organism adapted itself to feed on the nylon. This is an example of natural selection.

Thus, the correct answer is option B.