Class 10 Science - Chapter How do Organism Reproduce? NCERT Solutions | The anther contains (a) sepals. (b)

Why is variation beneficial to the species but not necessarily for the individual?

Draw a labelled diagram of the longitudinal section of a flower.

What are the functions performed by the testis in human beings?

Why does menstruation occur?

How will an organism be benefited if it reproduces through spores?

Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?

Asexual reproduction takes place through budding in

(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.

How does the embryo get nourishment inside the mother’s body?

What are the advantages of sexual reproduction over asexual reproduction?

How does reproduction help in providing stability to populations of species?

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

What is a good source of energy?

Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

What changes can you make in your habits to become more environment-friendly?

What is the difference between a reflex action and walking?

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?

Why should a magnesium ribbon be cleared before burning in air?

Define the principal focus of a concave mirror.

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?

Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.

What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?

What were the criteria used by Mendeléev in creating his Periodic Table?

What changes would you suggest in your home in order to be environment-friendly?

How is food transported in plants?

Can you suggest some changes in your school which would make it environment-friendly?

What were the limitations of Newlands’ Law of Octaves?

How is the concentration of hydronium ions (H₃O⁺) affected when a solution of an acid is diluted?

Why don’t two magnetic field lines intersect each other?

In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium?