Tag: evolution

Quizzes (6) Questions (19)

Questions Related to evolution

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

Assertion : Comparative biochemistry provides a strong evidence in favour of common ancestry of living beings. 

Reason : Genetic code is universal.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Convincing evidence of common ancestry comes from the similarities in the biochemical composition, reactions and physiological activities of living beings, like metabolic process, enzymes, cytochrome C, insulin, haemoglobin, blood and lymph etc. Genetic code is the sequence of DNA nucleotides that determines the amino acid sequence of the translated protein. The genetic code is read in triplets of basescalled codons.  Genetic code is applicable universally i.e. a codon specifies the same amino acid from a virus to a tree or human beings. The mRNA from chick oviduct introduced in E. coli produces an ovalbumen in the bacterium exactly similar to one formed in chick.

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

From the given data characteristics identify the correct pre - historic man:

(i) They were about 1.8m tall with well built body.

(ii) Broad and arched forehead and also well developed chin.

(iii) They could walk and run faster.

(iv) They made excellent tools and cave paintings.

  1. Cro-Magnon man.

  2. Tuang baby and Lucy.

  3. Pithecanthropus erectus.

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

Cro-Magnon man is characterized by a tall stature, well-developed chin, and advanced cultural traits like cave paintings and sophisticated tool-making.

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

The inherited character long neck in giraffe is an example of 

  1. Genetic variation

  2. Natural selection

  3. Gene drift

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

Long necks and long legs and can reach food high in the trees does not mean that a need to reach high browse was a causative factor in the evolution of those characteristics. Clearly, both Darwin's and Lamarck's conceptions of giraffe evolution were highly speculative.

So, the correct answer is "Natural selection".

Multiple choice zoology evolution examples of natural selection selection natural selection

Which of the following process is responsible for inheritance during natural selection?

  1. Crossover

  2. Mutation

  3. Variation

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

Natural selection:- The differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over.

principles of natural selection:-
  • 1) Variation. Organisms (within populations) exhibit individual         variation in appearance and behavior.
  • 2) Inheritance. Some traits are consistently passed on from parent to offspring.
  • 3) High rate of population growth.
  • 4) Differential survival and reproduction.    So, the correct answer is"All of the above".                                                                                  

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.