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.
Analysis of the organ structure in fossils allows us to make estimates of how far evolutionary relationships go, e.g,. presence of feathers in some fossil dinosaurs indicates that birds are closely related to reptiles.
Analysis of the organ structure in fossils allows us to make estimates of how far evolutionary relationships go, e.g,. presence of feathers in some fossil dinosaurs indicates that birds are closely related to reptiles.
In asexually reproducing organism, geographical isolation will not be a factor in speciation as it does not require another individual for reproduction. Only one individual is capable of producing next progeny hence geographical isolation will not act barrier.
In asexually reproducing organism, geographical isolation will not be a factor in speciation as it does not require another individual for reproduction. Only one individual is capable of producing next progeny hence geographical isolation will not act barrier.
It will affect the frequency of selection which is essential for survival. For effective selection, the population must consist of an infinitely large number of individuals in the population.
It will affect the frequency of selection which is essential for survival. For effective selection, the population must consist of an infinitely large number of individuals in the population.
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.
The different ways in which individual with a particular trait may increase are: Natural selection:- Certain variations give survival advantages to individuals in a population in a changed situation resulting in increase of their population. Genetic drift: accidents in small population even if theyRead more
The different ways in which individual with a particular trait may increase are:
Natural selection:- Certain variations give survival advantages to individuals in a population in a changed situation resulting in increase of their population.
Genetic drift: accidents in small population even if they give no survival advantage also lead to increase of certain individuals in population.
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 lessGive an example of characteristics being used to determine how close two species are in evolutionary terms.
Analysis of the organ structure in fossils allows us to make estimates of how far evolutionary relationships go, e.g,. presence of feathers in some fossil dinosaurs indicates that birds are closely related to reptiles.
Analysis of the organ structure in fossils allows us to make estimates of how far evolutionary relationships go, e.g,. presence of feathers in some fossil dinosaurs indicates that birds are closely related to reptiles.
See lessWill geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?
In asexually reproducing organism, geographical isolation will not be a factor in speciation as it does not require another individual for reproduction. Only one individual is capable of producing next progeny hence geographical isolation will not act barrier.
In asexually reproducing organism, geographical isolation will not be a factor in speciation as it does not require another individual for reproduction. Only one individual is capable of producing next progeny hence geographical isolation will not act barrier.
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 the small numbers of surviving tigers a cause of worry from the point of view of genetics?
It will affect the frequency of selection which is essential for survival. For effective selection, the population must consist of an infinitely large number of individuals in the population.
It will affect the frequency of selection which is essential for survival. For effective selection, the population must consist of an infinitely large number of individuals in the population.
See lessWhy 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 are the different ways in which individuals with a particular trait may increase in a population?
The different ways in which individual with a particular trait may increase are: Natural selection:- Certain variations give survival advantages to individuals in a population in a changed situation resulting in increase of their population. Genetic drift: accidents in small population even if theyRead more
The different ways in which individual with a particular trait may increase are:
See lessNatural selection:- Certain variations give survival advantages to individuals in a population in a changed situation resulting in increase of their population.
Genetic drift: accidents in small population even if they give no survival advantage also lead to increase of certain individuals in population.