What is the importance of DNA copying in reproduction?
Answer :
DNA (Deoxyribonucleic acid) is the genetic material found in the chromosomes, which are present in the nucleus of a cell. The DNA is the information site for making proteins and each specific type of protein leads to a specific type of body design.
Thus, it is the DNA molecule that determines the body design of an individual. Therefore, it can be concluded that it is the DNA that gets transferred from parents to offsprings and makes them look similar.
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DNA determines body structure
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Why is variation beneficial to the species but not necessarily for the individual?
Answer :
Variations are beneficial to the species than individual because sometimes for a species, the environmental conditions change so drastically that their survival becomes difficult. For example, if the temperature of water increases suddenly, then most of the bacteria living in that water would die. Only few variants that are resistant to heat would be able to survive. However, if these variants were not there, then the entire species of bacteria would have been destroyed. Thus, these variants help in the survival of the species. However, all variations are not necessarily beneficial for the individual organisms.
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How does binary fission differ from multiple fission?
Answer :
How will an organism be benefited if it reproduces through spores?
Answer :
Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?
Answer :
Why is vegetative propagation practised for growing some types of plants?
Answer :
Why is DNA copying an essential part of the process of reproduction?
Answer :
How is the process of pollination different from fertilization?
Answer :
What is the role of the seminal vesicles and the prostate gland?
Answer :
What are the changes seen in girls at the time of puberty?
Answer :
How does the embryo get nourishment inside the mother's body?
Answer :
If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?
Answer :
Asexual reproduction takes place through budding in
(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.
Answer :
Which of the following is not a part of the female reproductive system in human beings?
(a) Ovary
(b) Uterus
(c) Vas deferens
(d) Fallopian tube
Answer :
The anther contains
(a) sepals.
(b) ovules.
(c) carpel.
(d) pollen grains.
Answer :
What are the advantages of sexual reproduction over asexual reproduction?
Answer :
What are the functions performed by the testis in human beings?
Answer :
Why does menstruation occur?
Answer :
Draw a labelled diagram of the longitudinal section of a flower.
Answer :
What are the different methods of contraception?
Answer :
How are the modes for reproduction different in unicellular and multicellular organisms?
Answer :
How does reproduction help in providing stability to populations of species?
Answer :
What could be the reasons for adopting contraceptive methods?
Answer :
Science : CBSE NCERT Exercise Solutions for Class 10th for How do Organisms Reproduce? will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.
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