Download App

Heredity and Evolution — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceHeredity and Evolution5 Marks
Question
What do you understand by the term ‘evolution’? State Darwin’s theory of evolution.
✓

Answer

Evolution is the sequence of gradual changes that takes place in the primitive organisms over vmillions of year in which new species are produced. Darwin’s theory of evolution is known as:"The Theory of Natural Selection". It can be described as follows:
  1. Within any population there is natural variation. Some individuals have more favourable variations than others.
  2. Even though all species produce a large number of offspring’s, populations remain fairly constant naturally.
  3. This is due to the struggle between members of the same species and different species for food, space and mate.
  4. The struggle for survival within populations eliminates the unfit individuals. The fit individuals possessing favourable variations survive and reproduce. This is called natural selection.
  5. The individuals having favourable variations pass on these variations to their progeny from generation to generation.
  6. These variations when accumulated over a long period of time, lead to the origin of a new species.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions: [5 M]" from Heredity and Evolution→Heredity and Evolution — all question types→Science STD 10 question papers→Maharashtra Board STD 10 question papers→Maharashtra Board question paper generator→

Similar questions

Read the information given below and solve the questions based on it.
Electric energy is produced in various ways like hydroelectric, wind power, solar energy, bio-fuel, etc. These energy sources are inexhaustible, sustainable. Besides, it does not cause any environmental problem.
Questions and Answers:
(1) Above information is about which type of energy?
(2) Whether the fossil fuel is an example of this energy?
(3) Draw the flow chart of production of electric energy.
→
Effective disaster management makes us well prepared for future.
→
How will you explain the following statements with the help of the anomalous behaviour of water?
(1) In regions with cold climate, the aquatic plants and animals can survive even when the atmospheric temperature goes below 0 °C.
(2) In cold regions in winter the pipes for water supply break and even rocks crack.
→
Answer the question:
What is meant by satellite launch vehicles? Explain a satellite launch vehicle developed by ISRO with the help of a schematic diagram.
→
Write a short note.
Dew point temperature
→
Solve the following example.
Speed in first medium, $v_1 = 3 \times 10^8 m/s$
Speed in second medium, $v_2 = 2 \times 10^8 m/s$
Then $_2n_1 = ?$
→
Explain with an example, how genes control the characteristics (or traits).
→
The descriptions of five kinds of images are given below:
  1. Diminished and virtual.
  2. Enlarged and real.
  3. Enlarged and erect.
  4. Real and inverted.
  5. Virtual and the same size.
Which one of these describes the image formed:
  1. On the retina of the eye?
  2. By a magnifying glass?
  3. By a convex driving mirror on a car?
  4. By a plane mirror?
  5. on the screen of a slide projector?
→
Write short note: Production of cheese.
→
Why is it said that pollution control is important?
→