QQuestion
What do you mean by natural selection?
✓Answer
Natural selection is the process by which organisms that are better adapted to their environment are more likely to survive and reproduce. This means that the organisms with the traits that are most helpful in their environment are more likely to pass on those traits to their offspring. Over time, this can lead to the evolution of new species.
Related Questions
More WBBSE Moderate level questions
Explain the theory of Darwin with regard to the lengthening of the neck of a giraffe. What do you mean by 'Hot Dilute Soup'? [3+2=5] OR Construct the sequence of major events of organic evolution with the help of a schematic diagram. Give two examples of the problem-solving ability of chimpanzees. [3+2=5]
Which theory can be reached from the comparative study of the embryos of different vertebrate animals?
Match the words in column-A with the most appropriate words in column B and re-write the correct pair mentioning the serial no. of both columns COLUMN - A COLUMN - B 1. Meninges (a) Decrease in the number of digits in the legs 2. Sexual reproduction (b) Submergence of islands 3. Roller tongue (c) Centromere 4. Evolution of the horse (d) Telomere 5. Environmental problem of Sundarban (e) Protects brain and spinal cord from mechanical injury 6. Attaches chromosome with spindle fibre (f) Controlled by autosome (g) Occurs through the production of gametes and their union
Which reactants were used in the experiment of Miller and Urey regarding the chemical origin of life? (a) Oxygen, Methane, Nitrogen dioxide (b) Water, Methane, Ammonia, Hydrogen (c) Methane, Hydrogen sulphide, Carbon monoxide (d) Nitrous oxide, Methane, Carbon dioxide
Identify the features of homologous organs- (a) Different by structure but identical by origin and function (b) Different by origin and function but identical by structure (c) Different by origin but identical by structure and function (d) Identical by origin and structure but different by function
Prepare a list of reactants used and products in the experiment of Miller and Urey regarding biochemical origin of life.
Give any two examples of probable struggle for existence among animals who might dwell in a tall tree having trunk cavities.
What information related to evolution can be obtained from the discussion on comparative structure of hearts of different vertebrate groups ? Explain the following two terms in the light of Darwinism - (a) Survival of the fittest (b) Natural selection OR Explain the evolutionary significance of homologous and analogous organs with the help of example. What are the adaptive significances of air sacs of Pigeon ? [3+2=5]
Match the words in Column A with the most appropriate words in Column B and rewrite the correct pair mentioning the serial no. of both columns (any five): [1×5=5] Column A Column B 2.13 Adrenaline (a) Air Pollutant 2.14 Self pollination (b)According to Haldane the hot marine water containing different organic compounds 2.15 The position of flower is axial (c)The adoloscent phase of human development 2.16 Hot Dilute Soup (d)No need of agent 2.17 SPM (e)The senescence phase of human development. 2.18 Britleness of bone and pain at bone joints (f) Increases heart beat, cardiac output and blood pressure. (g) Dominant trait
Which of the following is an inference of Darwin's theory of evolution? (a) Natural Selection (b) Variation (c) Prodigality of reproduction (d) Food and Space is constant
Which of the following is not a tenet of Darwinism? (a) Struggle for existence (b) Variation (c) Natural selection (d) Inheritance of acquired character
Write three inferences deduced from the observations as mentioned in Darwin’s theory of origin of new species by natural selection with the help of a table. Explain the problem-solving ability of Chimpanzee regarding procurement of food. [3 + 2]