Biology · Science General

Evolution and Biological Adaptation

1,354 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

The theory proposed by Darwin was based on

  1. variation

  2. natural selection

  3. mutation

  4. inheritance of acquired characters
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Darwin's theory centers on natural selection - organisms with favorable variations are more likely to survive and reproduce, passing those traits to offspring. While variation provides the raw material, natural selection is the driving force. Mutation is the source of variation, and inheritance of acquired characters is Lamarck's incorrect theory.

Multiple choice

Pick the one which is not a part of Darwinian's natural selection theory.

  1. Overproduction

  2. Struggle for existence

  3. Use and disuse of organs

  4. Survival of the fittest
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Darwin's theory of natural selection includes overproduction, struggle for existence, and survival of the fittest. 'Use and disuse of organs' was Lamarck's theory of evolution, not part of Darwinian natural selection. Lamarck proposed that organisms could pass on acquired traits through use/disuse, which Darwin rejected.

Multiple choice

'Ontogeny recapitulates phylogeny' is called Biogenetic law, which is given by

  1. E Haeckel

  2. C Darwin

  3. J Lamarck

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

Ernst Haeckel proposed the Biogenetic Law, stating 'ontogeny recapitulates phylogeny' - that embryonic development replays evolutionary history. While influential, this theory is now considered an oversimplification. Darwin proposed natural selection, Lamarck proposed inheritance of acquired characteristics, and Mendel discovered genetic inheritance rules.

Multiple choice

The most accepted theory of evolution is

  1. theory of natural selection

  2. theory of origin of species

  3. theory of inheritance of acquired characters

  4. synthetic theory of evolution
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The synthetic theory of evolution (modern synthesis) combines Darwin's natural selection with Mendelian genetics and population genetics, making it the most comprehensive and accepted theory today. It explains evolution at genetic level. The other options are either incomplete or largely discredited theories.

Multiple choice

�The characters acquired by an organism during its life time is transmitted to the next generation. This statement is the basis of

  1. Darwinism

  2. Neo-Darwinism

  3. Synthetic theory

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

Lamarckism is based on the inheritance of acquired characteristics - the idea that traits developed during an organism's lifetime can be passed to offspring. This contrasts with Darwinism (natural selection), Neo-Darwinism (modern synthesis), and Synthetic theory, which do not support Lamarck's mechanism.

Multiple choice

Which of the following statements is/are correct?

a. Advanced organisms have acquired their particular body designs relatively recently. b. Primitive organisms have comparatively simpler body design. c. Advanced organisms are the same as complex organisms.

  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
E Correct answer
Explanation

Advanced organisms have acquired their particular body designs relatively recently. Primitive organisms have comparatively simpler body design. Advanced organisms are the same as complex organisms. This is the correct answer, as all statements are correct.

Multiple choice

Which of the following statements is/are correct?

a. Some groups of organisms, which have ancient body designs have not changed very much. b. Complexity in design of an organism increases over evolutionary time. c. Most life forms that we see today have arisen by an accumulation of changes in body design that allow the organism possessing them to survive better.

  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
E Correct answer
Explanation

This is the correct answer, as all statements are correct.

Multiple choice

Theme of evolution is

  1. descent from common ancestors with modifications

  2. ascent from common ancestors with modifications

  3. descent from most advanced ancestors with modifications

  4. descent from most advanced animal species
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Descent from common ancestors with modifications is the main basis of evolution.

Multiple choice

Who are the ‘priori philosophers’ in the passage?

Directions: Read the passage and answer the question that follows.

With respect to the theory of the origin of the forms of life peopling our globe, with which Darwin's name is bound up as closely as that of Newton with the theory of gravitation, nothing seems to be further from the mind of the present generation than any attempt to smother it with ridicule or to crush it by vehemence of denunciation. The Struggle for Existence, and Natural Selection, have become household words and every-day conceptions. The reality and the importance of the natural processes on which Darwin founds his deductions are no more doubted than those of growth and multiplication; and, whether the full potency attributed to them is admitted or not, no one doubts their vast and far-reaching significance. 

Wherever the biological sciences are studied, the 'Origin of Species' lights the paths of the investigator; wherever they are taught it permeates the course of instruction. Nor has the influence of Darwinian ideas been less profound, beyond the realms of Biology. The oldest of all philosophies, that of Evolution, was bound hand and foot and cast into utter darkness during the millennium of theological scholasticism. But Darwin poured new life-blood into the ancient frame; the bonds burst, and the revivified thought of ancient Greece has proved itself to be adequate expression of the universal order of things.

To any one who studies the signs of the times, the emergence of the philosophy of Evolution, in the attitude of claimant to the throne of the world of thought, from the limbo of hated and, as many hoped, forgotten things, is the most portentous event of the nineteenth century. But the most effective weapons of the modern champions of Evolution were fabricated by Darwin; and the 'Origin of Species' has enlisted a formidable body of combatants, trained in the severe school of Physical Science, whose ears might have long remained deaf to the speculations of a priori philosophers.

Even the theologians have almost ceased to pit the plain meaning of Genesis against the no less plain meaning of Nature. Their more candid, or more cautious, representatives have given up dealing with Evolution as if it were a damnable heresy, and have taken refuge in one of two courses. Either they deny that Genesis was meant to teach scientific truth, and thus save the veracity of the record at the expense of its authority; or they expend their energies in devising the cruel ingenuities of the reconciler, and torture texts in the vain hope of making them confess the creed of Science. But when the peine forte et dure is over, the antique sincerity of the venerable sufferer always reasserts itself. Genesis is honest to the core, and professes to be no more than it is, a repository of venerable traditions of unknown origin, claiming no scientific authority and possessing none.

  1. Philosophers prior to the times of Darwin

  2. Philosophers related to the Church

  3. Philosophers of the pre-renaissance period

  4. Philosophers opposed to change
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

‘A priori’ means following of fixed norms or dogma. Obviously, this means the Church that preaches dogma. Therefore, (2) is correct. 

Multiple choice

Who/What are/is the “repository of venerable traditions”?

Directions: Read the passage and answer the question that follows.

With respect to the theory of the origin of the forms of life peopling our globe, with which Darwin's name is bound up as closely as that of Newton with the theory of gravitation, nothing seems to be further from the mind of the present generation than any attempt to smother it with ridicule or to crush it by vehemence of denunciation. The Struggle for Existence, and Natural Selection, have become household words and every-day conceptions. The reality and the importance of the natural processes on which Darwin founds his deductions are no more doubted than those of growth and multiplication; and, whether the full potency attributed to them is admitted or not, no one doubts their vast and far-reaching significance. 

Wherever the biological sciences are studied, the 'Origin of Species' lights the paths of the investigator; wherever they are taught it permeates the course of instruction. Nor has the influence of Darwinian ideas been less profound, beyond the realms of Biology. The oldest of all philosophies, that of Evolution, was bound hand and foot and cast into utter darkness during the millennium of theological scholasticism. But Darwin poured new life-blood into the ancient frame; the bonds burst, and the revivified thought of ancient Greece has proved itself to be adequate expression of the universal order of things.

To any one who studies the signs of the times, the emergence of the philosophy of Evolution, in the attitude of claimant to the throne of the world of thought, from the limbo of hated and, as many hoped, forgotten things, is the most portentous event of the nineteenth century. But the most effective weapons of the modern champions of Evolution were fabricated by Darwin; and the 'Origin of Species' has enlisted a formidable body of combatants, trained in the severe school of Physical Science, whose ears might have long remained deaf to the speculations of a priori philosophers.

Even the theologians have almost ceased to pit the plain meaning of Genesis against the no less plain meaning of Nature. Their more candid, or more cautious, representatives have given up dealing with Evolution as if it were a damnable heresy, and have taken refuge in one of two courses. Either they deny that Genesis was meant to teach scientific truth, and thus save the veracity of the record at the expense of its authority; or they expend their energies in devising the cruel ingenuities of the reconciler, and torture texts in the vain hope of making them confess the creed of Science. But when the peine forte et dure is over, the antique sincerity of the venerable sufferer always reasserts itself. Genesis is honest to the core, and professes to be no more than it is, a repository of venerable traditions of unknown origin, claiming no scientific authority and possessing none.

  1. The antagonists of Darwin

  2. Evolution

  3. Heresy

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

Repository is something or somebody that holds something in safe custody. The reference here is to the concept of Genesis, which is a part of theology. Hence, (4) 

Multiple choice

What does the author mean by the phrase, “….torture texts in the vain hope of making them confess the creed of Science”?

Directions: Read the passage and answer the question that follows.

With respect to the theory of the origin of the forms of life peopling our globe, with which Darwin's name is bound up as closely as that of Newton with the theory of gravitation, nothing seems to be further from the mind of the present generation than any attempt to smother it with ridicule or to crush it by vehemence of denunciation. The Struggle for Existence, and Natural Selection, have become household words and every-day conceptions. The reality and the importance of the natural processes on which Darwin founds his deductions are no more doubted than those of growth and multiplication; and, whether the full potency attributed to them is admitted or not, no one doubts their vast and far-reaching significance. 

Wherever the biological sciences are studied, the 'Origin of Species' lights the paths of the investigator; wherever they are taught it permeates the course of instruction. Nor has the influence of Darwinian ideas been less profound, beyond the realms of Biology. The oldest of all philosophies, that of Evolution, was bound hand and foot and cast into utter darkness during the millennium of theological scholasticism. But Darwin poured new life-blood into the ancient frame; the bonds burst, and the revivified thought of ancient Greece has proved itself to be adequate expression of the universal order of things.

To any one who studies the signs of the times, the emergence of the philosophy of Evolution, in the attitude of claimant to the throne of the world of thought, from the limbo of hated and, as many hoped, forgotten things, is the most portentous event of the nineteenth century. But the most effective weapons of the modern champions of Evolution were fabricated by Darwin; and the 'Origin of Species' has enlisted a formidable body of combatants, trained in the severe school of Physical Science, whose ears might have long remained deaf to the speculations of a priori philosophers.

Even the theologians have almost ceased to pit the plain meaning of Genesis against the no less plain meaning of Nature. Their more candid, or more cautious, representatives have given up dealing with Evolution as if it were a damnable heresy, and have taken refuge in one of two courses. Either they deny that Genesis was meant to teach scientific truth, and thus save the veracity of the record at the expense of its authority; or they expend their energies in devising the cruel ingenuities of the reconciler, and torture texts in the vain hope of making them confess the creed of Science. But when the peine forte et dure is over, the antique sincerity of the venerable sufferer always reasserts itself. Genesis is honest to the core, and professes to be no more than it is, a repository of venerable traditions of unknown origin, claiming no scientific authority and possessing none.

  1. Decode anew the text of Genesis and explain the same in the light of scientific analysis

  2. Understand the scientific point of view of the Genesis

  3. Metamorphosis of Genesis should be done in view of scientific evidence

  4. Twisting the Genesis in order to obtain a scientifically proven text
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The author means that the supporters of Genesis make vain attempts to reinterpret the text of Genesis by making it conform to the scientific basis. 

Multiple choice

Which of the following options best illustrates the primary purpose of the passage?

Directions: Read the passage and answer the question that follows.

With respect to the theory of the origin of the forms of life peopling our globe, with which Darwin's name is bound up as closely as that of Newton with the theory of gravitation, nothing seems to be further from the mind of the present generation than any attempt to smother it with ridicule or to crush it by vehemence of denunciation. The Struggle for Existence, and Natural Selection, have become household words and every-day conceptions. The reality and the importance of the natural processes on which Darwin founds his deductions are no more doubted than those of growth and multiplication; and, whether the full potency attributed to them is admitted or not, no one doubts their vast and far-reaching significance. 

Wherever the biological sciences are studied, the 'Origin of Species' lights the paths of the investigator; wherever they are taught it permeates the course of instruction. Nor has the influence of Darwinian ideas been less profound, beyond the realms of Biology. The oldest of all philosophies, that of Evolution, was bound hand and foot and cast into utter darkness during the millennium of theological scholasticism. But Darwin poured new life-blood into the ancient frame; the bonds burst, and the revivified thought of ancient Greece has proved itself to be adequate expression of the universal order of things.

To any one who studies the signs of the times, the emergence of the philosophy of Evolution, in the attitude of claimant to the throne of the world of thought, from the limbo of hated and, as many hoped, forgotten things, is the most portentous event of the nineteenth century. But the most effective weapons of the modern champions of Evolution were fabricated by Darwin; and the 'Origin of Species' has enlisted a formidable body of combatants, trained in the severe school of Physical Science, whose ears might have long remained deaf to the speculations of a priori philosophers.

Even the theologians have almost ceased to pit the plain meaning of Genesis against the no less plain meaning of Nature. Their more candid, or more cautious, representatives have given up dealing with Evolution as if it were a damnable heresy, and have taken refuge in one of two courses. Either they deny that Genesis was meant to teach scientific truth, and thus save the veracity of the record at the expense of its authority; or they expend their energies in devising the cruel ingenuities of the reconciler, and torture texts in the vain hope of making them confess the creed of Science. But when the peine forte et dure is over, the antique sincerity of the venerable sufferer always reasserts itself. Genesis is honest to the core, and professes to be no more than it is, a repository of venerable traditions of unknown origin, claiming no scientific authority and possessing none.

  1. Darwin was a biologist much beyond his times. He did not get respect and recognition from the thinkers and scientists of his age.

  2. The 'Origin of Species' lights the paths of the investigator of biology. Wherever it is taught, it permeates the course of instruction.

  3. Darwin’s hypothesis, even if it was not supported by the advocates of Genesis, has a stronger scientific basis and has been universally accepted.

  4. The supporters of Genesis criticised Darwin, but their criticism did not have a scientific base.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The main focus of the passage is that Darwinian theory ran contrary to prevalent beliefs propagated by the church, but it ultimately prevailed because of its scientific veracity. Thus, (3) is closest to being the primary purpose of the passage.