No. Using a copper-T will not provide a protection from sexually transmitted diseases, as it does not prevent the entry of semen. It only prevents the implantation of the embryo in the uterus. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8Read more
No. Using a copper-T will not provide a protection from sexually transmitted diseases, as it does not prevent the entry of semen. It only prevents the implantation of the embryo in the uterus.
The embryo develops inside the mother’s body for about nine months. Inside the uterus, the outer tissue surrounding the embryo develops finger-like projections called villi. These villi are surrounded by uterine tissue and maternal blood. They provide a large surface area for exchange of oxygen andRead more
The embryo develops inside the mother’s body for about nine months. Inside the uterus, the outer tissue surrounding the embryo develops finger-like projections called villi. These villi are surrounded by uterine tissue and maternal blood. They provide a large surface area for exchange of oxygen and nutrients. Also, there is a special tissue called placenta, which is embedded in the uterine wall. The embryo receives the oxygen and nutrients from the mother’s blood via the placenta. The waste materials produced by the embryo are also removed through the placenta.
Pollination is the process of transfer of pollens from anther to stigma. It occurs with the help of certain pollinators such as air, water, birds, or some insects. Fertilization, on the other hand, is the fusion of the male and female gametes. It occurs inside the ovule and leads to the formation ofRead more
Pollination is the process of transfer of pollens from anther to stigma. It occurs with the help of certain pollinators such as air, water, birds, or some insects. Fertilization, on the other hand, is the fusion of the male and female gametes. It occurs inside the ovule and leads to the formation of zygote.
DNA (Deoxyribonucleic acid) copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. TheRead more
DNA (Deoxyribonucleic acid) copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. The copying of DNA always takes place along with the creation of additional cellular structure. This process is then followed by division of a cell to form two cells.
There are many advantages, if an organism reproduces through spores. Advantages of spore formation: • Large numbers of spores are produced in one sporangium. • Spores are distributed easily by air to far-off places to avoid competition at one place. • Spores are covered by thick walls to prevent dehRead more
There are many advantages, if an organism reproduces through spores.
Advantages of spore formation:
• Large numbers of spores are produced in one sporangium.
• Spores are distributed easily by air to far-off places to avoid competition at one
place.
• Spores are covered by thick walls to prevent dehydration under unfavourable
conditions.
In binary fission, a single cell divides into two equal halves. Amoeba and Bacteria divide by binary fission. In multiple fission, a single cell divides into many daughter cells simultaneously. Amoeba and Plasmodium divide by multiple fission. For more answers visit to website: https://www.tiwariacaRead more
In binary fission, a single cell divides into two equal halves. Amoeba and Bacteria divide by binary fission.
In multiple fission, a single cell divides into many daughter cells simultaneously. Amoeba and Plasmodium divide by multiple fission.
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. ORead more
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.
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.
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.
Take two small beakers and label them as A and B. Fill beaker A with water. Now make a cylindrical-shaped roll from a filter paper and keep it as a bridge between beaker A and beaker B, as shown in the figure. Attach few germinating seeds in the middle of the filter paper bridge. Now, cover the entiRead more
Take two small beakers and label them as A and B. Fill beaker A with water. Now make a cylindrical-shaped roll from a filter paper and keep it as a bridge between beaker A and beaker B, as shown in the figure. Attach few germinating seeds in the middle of the filter paper bridge. Now, cover the entire set-up with a transparent plastic container so that the moisture is retained.
Observation:
The roots of the germinating seeds will grow towards beaker A.This experiment demonstrates the phenomenon of hydrotropism
If a woman is using a copper−T, will it help in protecting her from sexually transmitted diseases?
No. Using a copper-T will not provide a protection from sexually transmitted diseases, as it does not prevent the entry of semen. It only prevents the implantation of the embryo in the uterus. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8Read more
No. Using a copper-T will not provide a protection from sexually transmitted diseases, as it does not prevent the entry of semen. It only prevents the implantation of the embryo in the uterus.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
How does the embryo get nourishment inside the mother’s body?
The embryo develops inside the mother’s body for about nine months. Inside the uterus, the outer tissue surrounding the embryo develops finger-like projections called villi. These villi are surrounded by uterine tissue and maternal blood. They provide a large surface area for exchange of oxygen andRead more
The embryo develops inside the mother’s body for about nine months. Inside the uterus, the outer tissue surrounding the embryo develops finger-like projections called villi. These villi are surrounded by uterine tissue and maternal blood. They provide a large surface area for exchange of oxygen and nutrients. Also, there is a special tissue called placenta, which is embedded in the uterine wall. The embryo receives the oxygen and nutrients from the mother’s blood via the placenta. The waste materials produced by the embryo are also removed through the placenta.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
How is the process of pollination different from fertilisation?
Pollination is the process of transfer of pollens from anther to stigma. It occurs with the help of certain pollinators such as air, water, birds, or some insects. Fertilization, on the other hand, is the fusion of the male and female gametes. It occurs inside the ovule and leads to the formation ofRead more
Pollination is the process of transfer of pollens from anther to stigma. It occurs with the help of certain pollinators such as air, water, birds, or some insects. Fertilization, on the other hand, is the fusion of the male and female gametes. It occurs inside the ovule and leads to the formation of zygote.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
Why is DNA copying an essential part of the process of reproduction?
DNA (Deoxyribonucleic acid) copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. TheRead more
DNA (Deoxyribonucleic acid) copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. The copying of DNA always takes place along with the creation of additional cellular structure. This process is then followed by division of a cell to form two cells.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
How will an organism be benefited if it reproduces through spores?
There are many advantages, if an organism reproduces through spores. Advantages of spore formation: • Large numbers of spores are produced in one sporangium. • Spores are distributed easily by air to far-off places to avoid competition at one place. • Spores are covered by thick walls to prevent dehRead more
There are many advantages, if an organism reproduces through spores.
Advantages of spore formation:
• Large numbers of spores are produced in one sporangium.
• Spores are distributed easily by air to far-off places to avoid competition at one
place.
• Spores are covered by thick walls to prevent dehydration under unfavourable
conditions.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
How does binary fission differ from multiple fission?
In binary fission, a single cell divides into two equal halves. Amoeba and Bacteria divide by binary fission. In multiple fission, a single cell divides into many daughter cells simultaneously. Amoeba and Plasmodium divide by multiple fission. For more answers visit to website: https://www.tiwariacaRead more
In binary fission, a single cell divides into two equal halves. Amoeba and Bacteria divide by binary fission.
In multiple fission, a single cell divides into many daughter cells simultaneously. Amoeba and Plasmodium divide by multiple fission.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-8/
Why is variation beneficial to the species but not necessarily for the individual?
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. ORead more
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.
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/
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/
Design an experiment to demonstrate hydrotropism.
Take two small beakers and label them as A and B. Fill beaker A with water. Now make a cylindrical-shaped roll from a filter paper and keep it as a bridge between beaker A and beaker B, as shown in the figure. Attach few germinating seeds in the middle of the filter paper bridge. Now, cover the entiRead more
Take two small beakers and label them as A and B. Fill beaker A with water. Now make a cylindrical-shaped roll from a filter paper and keep it as a bridge between beaker A and beaker B, as shown in the figure. Attach few germinating seeds in the middle of the filter paper bridge. Now, cover the entire set-up with a transparent plastic container so that the moisture is retained.
Observation:
The roots of the germinating seeds will grow towards beaker A.This experiment demonstrates the phenomenon of hydrotropism
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-7/