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 boRead more
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.
Contraceptive methods are mainly adopted because of the following reasons: (i) To prevent unwanted pregnancies. (ii) To control population rise or birth rate. (iii) To prevent the transfer of sexually transmitted diseases. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutiRead more
Contraceptive methods are mainly adopted because of the following reasons:
(i) To prevent unwanted pregnancies.
(ii) To control population rise or birth rate.
(iii) To prevent the transfer of sexually transmitted diseases.
Living organisms reproduce for the continuation of a particular species. It helps in providing stability to the population of species by producing a new individual that resembles the parents. This is the reason why cats give birth to only cats or dogs give birth to only dogs. Therefore, reproductionRead more
Living organisms reproduce for the continuation of a particular species. It helps in
providing stability to the population of species by producing a new individual that
resembles the parents. This is the reason why cats give birth to only cats or dogs give
birth to only dogs. Therefore, reproduction provides stability to populations of dogs or cats
or any other species.
In unicellular organisms, reproduction occurs by the division of the entire cell. The modes of reproduction in unicellular organisms can be fission, budding, etc. whereas in multicellular organisms, specialised reproductive organs are present. Therefore, they can reproduce by complex reproductive meRead more
In unicellular organisms, reproduction occurs by the division of the entire cell. The modes
of reproduction in unicellular organisms can be fission, budding, etc. whereas in
multicellular organisms, specialised reproductive organs are present. Therefore, they can
reproduce by complex reproductive methods such as vegetative propagation, spore
formation, etc. In more complex multicellular organisms such as human beings and plants,
the mode of reproduction is sexual reproduction.
The contraceptive methods can be broadly divided into the following types: • Natural method: It involves avoiding the chances of meeting of sperms and ovum. In this method, the sexual act is avoided from day 10th to 17th of the menstrual cycle because during this period, ovulation is expected and thRead more
The contraceptive methods can be broadly divided into the following types:
• Natural method: It involves avoiding the chances of meeting of sperms and ovum.
In this method, the sexual act is avoided from day 10th to 17th of the menstrual
cycle because during this period, ovulation is expected and therefore, the chances
of fertilization are very high.
• Barrier method: In this method, the fertilization of ovum and sperm is prevented
with the help of barriers. Barriers are available for both males and females.
Condoms are barriers made of thin rubber that are used to cover penis in males
and vagina in females.
• Oral contraceptives: In this method, tablets or drugs are taken orally. These
contain small doses of hormones that prevent the release of eggs and thus
fertilization cannot occur.
• Implants and surgical methods: Contraceptive devices such as the loop or
Copper-T are placed in uterus to prevent pregnancy. Some surgical methods can
also be used to block the gamete transfer. It includes the blocking of vas deferens
to prevent the transfer of sperms known as vasectomy. Similarly, fallopian tubes
of the female can be blocked so that the egg will not reach the uterus known as
tubectomy.
Menstruation is a process in which blood and mucous flows out every month through the vagina. This process occurs every month because one egg is released from the ovary every month and at the same time, the uterus (womb) prepares itself to receive the fertilized egg. Thus, the inner lining of the utRead more
Menstruation is a process in which blood and mucous flows out every month through the
vagina. This process occurs every month because one egg is released from the ovary every
month and at the same time, the uterus (womb) prepares itself to receive the fertilized
egg. Thus, the inner lining of the uterus gets thickened and is supplied with blood to
nourish the embryo. If the egg does not get fertilised, then the lining of the uterus breaks
down slowly and gets released in the form of blood and mucous from the vagina.
The testes are the male reproductive organs that are located outside the abdominal cavity within a pouch called scrotum. Functions of testes: • Produce sperms • Produce a hormone called testosterone, which brings about secondary sexual characters in boys. For more answers visit to website: https://wRead more
The testes are the male reproductive organs that are located outside the abdominal cavity
within a pouch called scrotum.
Functions of testes:
• Produce sperms
• Produce a hormone called testosterone, which brings about secondary sexual
characters in boys.
Advantages of sexual reproduction: • In sexual reproduction, more variations are produced. Thus, it ensures survival of species in a population. • The new formed individual has characteristics of both the parents. • Variations are more viable in sexual mode than in asexual one. This is because in asRead more
Advantages of sexual reproduction:
• In sexual reproduction, more variations are produced. Thus, it ensures survival of
species in a population.
• The new formed individual has characteristics of both the parents.
• Variations are more viable in sexual mode than in asexual one. This is because in
asexual reproduction, DNA has to function inside the inherited cellular apparatus.
(c) Vas deferens is not a part of the female reproductive system in human beings. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
(c) Vas deferens is not a part of the female reproductive system in human beings.
What is the importance of DNA copying in reproduction?
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 boRead more
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.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
What could be the reasons for adopting contraceptive methods?
Contraceptive methods are mainly adopted because of the following reasons: (i) To prevent unwanted pregnancies. (ii) To control population rise or birth rate. (iii) To prevent the transfer of sexually transmitted diseases. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutiRead more
Contraceptive methods are mainly adopted because of the following reasons:
(i) To prevent unwanted pregnancies.
(ii) To control population rise or birth rate.
(iii) To prevent the transfer of sexually transmitted diseases.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
How does reproduction help in providing stability to populations of species?
Living organisms reproduce for the continuation of a particular species. It helps in providing stability to the population of species by producing a new individual that resembles the parents. This is the reason why cats give birth to only cats or dogs give birth to only dogs. Therefore, reproductionRead more
Living organisms reproduce for the continuation of a particular species. It helps in
providing stability to the population of species by producing a new individual that
resembles the parents. This is the reason why cats give birth to only cats or dogs give
birth to only dogs. Therefore, reproduction provides stability to populations of dogs or cats
or any other species.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
How are the modes for reproduction different in unicellular and multicellular organisms?
In unicellular organisms, reproduction occurs by the division of the entire cell. The modes of reproduction in unicellular organisms can be fission, budding, etc. whereas in multicellular organisms, specialised reproductive organs are present. Therefore, they can reproduce by complex reproductive meRead more
In unicellular organisms, reproduction occurs by the division of the entire cell. The modes
of reproduction in unicellular organisms can be fission, budding, etc. whereas in
multicellular organisms, specialised reproductive organs are present. Therefore, they can
reproduce by complex reproductive methods such as vegetative propagation, spore
formation, etc. In more complex multicellular organisms such as human beings and plants,
the mode of reproduction is sexual reproduction.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
What are the different methods of contraception?
The contraceptive methods can be broadly divided into the following types: • Natural method: It involves avoiding the chances of meeting of sperms and ovum. In this method, the sexual act is avoided from day 10th to 17th of the menstrual cycle because during this period, ovulation is expected and thRead more
The contraceptive methods can be broadly divided into the following types:
• Natural method: It involves avoiding the chances of meeting of sperms and ovum.
In this method, the sexual act is avoided from day 10th to 17th of the menstrual
cycle because during this period, ovulation is expected and therefore, the chances
of fertilization are very high.
• Barrier method: In this method, the fertilization of ovum and sperm is prevented
with the help of barriers. Barriers are available for both males and females.
Condoms are barriers made of thin rubber that are used to cover penis in males
and vagina in females.
• Oral contraceptives: In this method, tablets or drugs are taken orally. These
contain small doses of hormones that prevent the release of eggs and thus
fertilization cannot occur.
• Implants and surgical methods: Contraceptive devices such as the loop or
Copper-T are placed in uterus to prevent pregnancy. Some surgical methods can
also be used to block the gamete transfer. It includes the blocking of vas deferens
to prevent the transfer of sperms known as vasectomy. Similarly, fallopian tubes
of the female can be blocked so that the egg will not reach the uterus known as
tubectomy.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
Why does menstruation occur?
Menstruation is a process in which blood and mucous flows out every month through the vagina. This process occurs every month because one egg is released from the ovary every month and at the same time, the uterus (womb) prepares itself to receive the fertilized egg. Thus, the inner lining of the utRead more
Menstruation is a process in which blood and mucous flows out every month through the
vagina. This process occurs every month because one egg is released from the ovary every
month and at the same time, the uterus (womb) prepares itself to receive the fertilized
egg. Thus, the inner lining of the uterus gets thickened and is supplied with blood to
nourish the embryo. If the egg does not get fertilised, then the lining of the uterus breaks
down slowly and gets released in the form of blood and mucous from the vagina.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
What are the functions performed by the testis in human beings?
The testes are the male reproductive organs that are located outside the abdominal cavity within a pouch called scrotum. Functions of testes: • Produce sperms • Produce a hormone called testosterone, which brings about secondary sexual characters in boys. For more answers visit to website: https://wRead more
The testes are the male reproductive organs that are located outside the abdominal cavity
within a pouch called scrotum.
Functions of testes:
• Produce sperms
• Produce a hormone called testosterone, which brings about secondary sexual
characters in boys.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
What are the advantages of sexual reproduction over asexual reproduction?
Advantages of sexual reproduction: • In sexual reproduction, more variations are produced. Thus, it ensures survival of species in a population. • The new formed individual has characteristics of both the parents. • Variations are more viable in sexual mode than in asexual one. This is because in asRead more
Advantages of sexual reproduction:
• In sexual reproduction, more variations are produced. Thus, it ensures survival of
species in a population.
• The new formed individual has characteristics of both the parents.
• Variations are more viable in sexual mode than in asexual one. This is because in
asexual reproduction, DNA has to function inside the inherited cellular apparatus.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
Which of the following is not a part of the female reproductive system in human beings?
(c) Vas deferens is not a part of the female reproductive system in human beings. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
(c) Vas deferens is not a part of the female reproductive system in human beings.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
The anther contains
(d) The anther contains pollen grains. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
(d) The anther contains pollen grains.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/