Class 10 Science - Chapter Heredity and Evolution NCERT Solutions | Give an example of characteristics being
Give an example of characteristics being used to determine how close two species are in evolutionary terms.
The more characteristics of two species have in common, they seem to be more closely related. And the more closely they are related, more recently they shared a common ancestor or the evolutionary relationship.
Mostly the homologous characteristics derive from how close two species are in evolutionary terms. For example, mammals have four limbs as birds, reptiles and amphibians possess. Basic structures of the limbs are very similar and they are modified to do different functions. The characteristics can be similar in different organisms because of sharing the common ancestors which helps to identify the evolutionary relationship among two close related species. Another example is the common connection link between the reptiles and birds. The connecting link between the reptiles and the birds are known as archaeopteryx. Aves have the evolutionary characters which are derived from the reptiles, in which the forelimbs of the reptiles modified into the feathers or the wings.
More Questions From Class 10 Science - Chapter Heredity and Evolution
- Q:-
Outline a project which aims to find the dominant coat colour in dogs.
- Q:-
How is the sex of the child determined in human beings?
- Q:-
A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits – blood group A or O – is dominant? Why or why not?
- Q:-
How do Mendel’s experiments show that traits are inherited independently?
- Q:-
If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?
- Q:-
Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?
- Q:-
Explain the terms analogous and homologous organs with examples.
- Q:-
How do Mendel’s experiments show that traits may be dominant or recessive?
- Q:-
Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?
- Q:-
How does the creation of variations in a species promote survival?
Popular Questions of Class 10 Science
- Q:-
Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
- Q:-
What is a good source of energy?
- Q:-
Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?
- Q:-
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
- Q:-
What changes can you make in your habits to become more environment-friendly?
- Q:-
What is the difference between a reflex action and walking?
- Q:-
What is the importance of DNA copying in reproduction?
- Q:-
Why should a magnesium ribbon be cleared before burning in air?
- Q:-
Define the principal focus of a concave mirror.
- Q:-
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Recently Viewed Questions of Class 10 Science
- Q:-
What were the criteria used by Mendeléev in creating his Periodic Table?
- Q:-
Which of the following constitute a food-chain?
(a) Grass, wheat and mango
(b) Grass, goat and human
(c) Goat, cow and elephant
(d) Grass, fish and goat - Q:-
A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?
- Q:-
Explain different ways to induce current in a coil.
- Q:-
What is the role of saliva in the digestion of food?
- Q:-
Five solutions A,B,C,D and E when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is
(a) neutral?
(b) strongly alkaline?
(c) strongly acidic?
(d) weakly acidic?
(e) weakly alkaline?Arrange the pH in increasing order of hydrogen-ion concentration.
- Q:-
(a) Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?
(b) Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common? - Q:-
One-half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.
- Q:-
Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.
- Q:-
What effect does the concentration of H+(aq) ions have on the nature of the solution?
- All Chapters Of Class 10 Science
- All Subjects Of Class 10