Tag: zoology

Questions Related to zoology

Vermis is

zoology nervous system of man parts of the brain brain and its parts brain

  1. A tiny worm

  2. Cavity of medulla

  3. The large median lobe of cerebellum in mammals

  4. A portion of mid brain

Show answer
Correct Option: C
Explanation:

The cerebellum is made up of two lateral lobe and a large vermis lobe which is divided into nine segments. It is associated with the fastigial nucleus. It is concerned with the regulation of the regulation of the muscle tone for posture and locomotion. 

Hence, the correct answer is 'The large median lobe of cerebellum in mammals'

The part of brain without its ventricle is

zoology nervous system of man parts of the brain brain and its parts brain

  1. Cerebrum

  2. Cerebellum

  3. Medulla

  4. Diencephalon

Show answer
Correct Option: B
Explanation:

The ventricles are the hollow spaces in the brain that are lined with the choroid plexus and is filled with the cerebrospinal fluid. The lateral ventricles are located in the hemispheres of the telencephalon (cerebrum). The 3rd ventricle is located in the centre of the diencephalon. The 4th ventricle is located in the centre of the metencephalon (between pons and cerebellum). The cerebral aqueduct connects the 3rd and 4th ventricle and it is located in the centre of the mesencephalon (midbrain). The cerebellum does not have any ventricle.

Hence, the correct answer is 'Cerebellum'

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

zoology evolution examples of natural selection selection natural selection

  1. Noe-Lamarckism

  2. Gene drift

  3. Natural selection

  4. All of the above

Show answer
Correct Option: C
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.

Which of the following is a result of natural selection?

zoology variation examples of natural selection selection natural selection

  1. Seedless grapes

  2. Insecticide - resistant mosquitoes

  3. Disease - resistant crop plants

  4. Cattle for high milk yield

Show answer
Correct Option: B
Explanation:

When the insecticides are used on a large scale, the genes in the organism are mutated and then there is no effect of the insecticide on the organism. This is the phenomenon of resistance evolved due to natural selection which allows the development of the mosquitoes which are resistant.

Thus, the correct answer is option B. 

The inherited character long neck in giraffe is an example of 

zoology evolution examples of natural selection selection natural selection

  1. Genetic variation

  2. Natural selection

  3. Gene drift

  4. All of the above

Show answer
Correct Option: B
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".

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

zoology evolution examples of natural selection selection natural selection

  1. Crossover

  2. Mutation

  3. Variation

  4. All of the above

Show answer
Correct Option: D
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".                                                                                  

Darwin's finches are an example of 

zoology evolution examples of natural selection selection natural selection

  1. Genetic variation

  2. Adaptive radiation

  3. Convergent evolution

  4. None of the above

Show answer
Correct Option: B
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.

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

zoology evolution examples of natural selection selection 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.

Show answer
Correct Option: A
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.

Warrior ants have a chemical signal that tells other ants in the family not to attack. Some have adapted and learned to imitate the chemical signal from other colonies so they can invade and take over another colony and the workers will never know. The given example can be related to 

zoology variation examples of natural selection selection natural selection

  1. Genetic variation

  2. Mutation

  3. Natural selection

  4. None of the above

Show answer
Correct Option: C
Explanation:

The given example is of natural selection. According to the theory of natural selection, nature supports the survival of the fittest. It means, only those individuals will survive, who adapt themselves to the change in the environment. In the given case, those ants survived, who adapted the mechanism of chemical signalling and were selected by the nature as fittest. Whereas, those organisms died who didn't adapt the mechanism. So, the correct option is B.

Maximum ............ increase the chance of survival.

zoology variation examples of natural selection selection natural selection

  1. Variation

  2. Adaptation

  3. Mutation

  4. None of the above

Show answer
Correct Option: B
Explanation:

Adaptation:- process by which an animal or plant species becomes fitted to its environment; it is the result of natural selection's acting upon heritable variation.

So, the correct answer is "Adaptation".