Amongst all the organisms given, since all are well adjusted in their specific niches, so it can't be said as to which has a better body design. A simple bacteria can survive in thermal vents to polar region. so they are all evolved organisms, some are more recent, while some more ancient.
Amongst all the organisms given, since all are well adjusted in their specific niches, so it can’t be said as to which has a better body design. A simple bacteria can survive in thermal vents to polar region. so they are all evolved organisms, some are more recent, while some more ancient.
Species is defined as group of individuals that can interbreed. All human beings are Homo sapiens and are capable of interbreeding inspite of some differences. Thus they are said to belong to same species
Species is defined as group of individuals that can interbreed. All human beings are Homo sapiens and are capable of interbreeding inspite of some differences. Thus they are said to belong to same species
Preserved traces of living organisms are called fossils. Fossils found closer to the surface of earth are more recent in origin than the fossils we find in deeper layers.
Preserved traces of living organisms are called fossils. Fossils found closer to the surface of earth are more recent in origin than the fossils we find in deeper layers.
Any change in non-reproductive tissues cannot be passed on to the DNA of the germ-cells. therefore, the traits acquired during life-time of an individual are not inherited.
Any change in non-reproductive tissues cannot be passed on to the DNA of the germ-cells. therefore, the traits acquired during life-time of an individual are not inherited.
Contraceptive methods should be adopted as: . They help in spacing two children. . Thus helps in maintaining a woman's and child's health. . Better care and healthier society. . Also prevention of sexually transmitted diseases on using condoms. . More productivity and hence better economic status.
Contraceptive methods should be adopted as:
. They help in spacing two children.
. Thus helps in maintaining a woman’s and child’s health.
. Better care and healthier society.
. Also prevention of sexually transmitted diseases on using condoms.
. More productivity and hence better economic status.
Since we are mammals, the development of growing foetus takes place inside the mother's womb. Thus, during each cycle, the uterus prepares itself for implantation by increasing blood flow and thickening of uterine walls. In case, fertilisation does not take place, the thickened wall is not required,Read more
Since we are mammals, the development of growing foetus takes place inside the mother’s womb. Thus, during each cycle, the uterus prepares itself for implantation by increasing blood flow and thickening of uterine walls. In case, fertilisation does not take place, the thickened wall is not required, it thus is shed along with blood and mucus in the form of menstrual flow.
(i) Plant raised by vegetative propagation can bear flower and fruits earlier than those produced from seeds. (ii) It also helps in propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds. (iii) All plants produced by this method are genetically siRead more
(i) Plant raised by vegetative propagation can bear flower and fruits earlier than those produced from seeds.
(ii) It also helps in propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds.
(iii) All plants produced by this method are genetically similar to the parent plant to have its all characteristics.
(iv) Thus, desirable features of parent plant can be retained and expressed without any change future generations.
Diabetes is caused due to deficiency or less secretion of insulin by pancreas. In such person, the blood sugar level is high. Function of insulin is to convert excess sugar present in blood into glycogen. Patients suffering from diabetes are thus given insulin injection to control their blood sugarRead more
Diabetes is caused due to deficiency or less secretion of insulin by pancreas. In such person, the blood sugar level is high. Function of insulin is to convert excess sugar present in blood into glycogen. Patients suffering from diabetes are thus given insulin injection to control their blood sugar level.
In evolutionary terms, can we say which among bacteria, spiders, fish and chimpanzees have a ‘better’ body design? Why or why not?
Amongst all the organisms given, since all are well adjusted in their specific niches, so it can't be said as to which has a better body design. A simple bacteria can survive in thermal vents to polar region. so they are all evolved organisms, some are more recent, while some more ancient.
Amongst all the organisms given, since all are well adjusted in their specific niches, so it can’t be said as to which has a better body design. A simple bacteria can survive in thermal vents to polar region. so they are all evolved organisms, some are more recent, while some more ancient.
See lessWhy are human beings who look so different from each other in terms of size, colour and looks said to belong to the same species?
Species is defined as group of individuals that can interbreed. All human beings are Homo sapiens and are capable of interbreeding inspite of some differences. Thus they are said to belong to same species
Species is defined as group of individuals that can interbreed. All human beings are Homo sapiens and are capable of interbreeding inspite of some differences. Thus they are said to belong to same species
See lessWhat are fossils? What do they tell us about the process of evolution?
Preserved traces of living organisms are called fossils. Fossils found closer to the surface of earth are more recent in origin than the fossils we find in deeper layers.
Preserved traces of living organisms are called fossils. Fossils found closer to the surface of earth are more recent in origin than the fossils we find in deeper layers.
See lessCan the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
No, though the function of wing in both the cases is same but their structural plan and origin is different.
No, though the function of wing in both the cases is same but their structural plan and origin is different.
See lessWhat factors could lead to the rise of a new species?
Factors that would lead to rise of new species are: (i) Migration (ii) Natural selection (iii) Geographical isolation (iv) Mutation.
Factors that would lead to rise of new species are:
See less(i) Migration
(ii) Natural selection
(iii) Geographical isolation
(iv) Mutation.
Why are traits acquired during the life-time of an individual not inherited?
Any change in non-reproductive tissues cannot be passed on to the DNA of the germ-cells. therefore, the traits acquired during life-time of an individual are not inherited.
Any change in non-reproductive tissues cannot be passed on to the DNA of the germ-cells. therefore, the traits acquired during life-time of an individual are not inherited.
See lessWhat could be the reasons for adopting contraceptive methods?
Contraceptive methods should be adopted as: . They help in spacing two children. . Thus helps in maintaining a woman's and child's health. . Better care and healthier society. . Also prevention of sexually transmitted diseases on using condoms. . More productivity and hence better economic status.
Contraceptive methods should be adopted as:
See less. They help in spacing two children.
. Thus helps in maintaining a woman’s and child’s health.
. Better care and healthier society.
. Also prevention of sexually transmitted diseases on using condoms.
. More productivity and hence better economic status.
Why does menstruation occur?
Since we are mammals, the development of growing foetus takes place inside the mother's womb. Thus, during each cycle, the uterus prepares itself for implantation by increasing blood flow and thickening of uterine walls. In case, fertilisation does not take place, the thickened wall is not required,Read more
Since we are mammals, the development of growing foetus takes place inside the mother’s womb. Thus, during each cycle, the uterus prepares itself for implantation by increasing blood flow and thickening of uterine walls. In case, fertilisation does not take place, the thickened wall is not required, it thus is shed along with blood and mucus in the form of menstrual flow.
See lessWhy is vegetative propagation practiced for growing some types of plants?
(i) Plant raised by vegetative propagation can bear flower and fruits earlier than those produced from seeds. (ii) It also helps in propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds. (iii) All plants produced by this method are genetically siRead more
(i) Plant raised by vegetative propagation can bear flower and fruits earlier than those produced from seeds.
See less(ii) It also helps in propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds.
(iii) All plants produced by this method are genetically similar to the parent plant to have its all characteristics.
(iv) Thus, desirable features of parent plant can be retained and expressed without any change future generations.
Why are some patients of diabetes treated by giving injections of insulin?
Diabetes is caused due to deficiency or less secretion of insulin by pancreas. In such person, the blood sugar level is high. Function of insulin is to convert excess sugar present in blood into glycogen. Patients suffering from diabetes are thus given insulin injection to control their blood sugarRead more
Diabetes is caused due to deficiency or less secretion of insulin by pancreas. In such person, the blood sugar level is high. Function of insulin is to convert excess sugar present in blood into glycogen. Patients suffering from diabetes are thus given insulin injection to control their blood sugar level.
See less