The presence of feathers in dinosaurs and birds indicates that they are evolutionarily related. Dinosaurs had feathers not for flying but instead these feathers provided insulation to these warm-blooded animals. However, the feathers in birds are used for flight. This proves that reptiles and birdsRead more
The presence of feathers in dinosaurs and birds indicates that they are evolutionarily
related. Dinosaurs had feathers not for flying but instead these feathers provided
insulation to these warm-blooded animals. However, the feathers in birds are used for
flight. This proves that reptiles and birds are closely related and that the evolution of wings
started in reptiles.
Geographical isolation prevents gene flow between populations of a species whereas asexual reproduction generally involves only one individual. In an asexually reproducing organism, variations can occur only when the copying of DNA is not accurate. Therefore, geographical isolation cannot prevent thRead more
Geographical isolation prevents gene flow between populations of a species whereas
asexual reproduction generally involves only one individual. In an asexually reproducing
organism, variations can occur only when the copying of DNA is not accurate. Therefore,
geographical isolation cannot prevent the formation of new species in an asexually
reproducing organism.
Sometimes for a species, the environmental conditions change so drastically that their survival becomes difficult. For example, if the temperature of water increases suddenly, most of the bacteria living in that water would die. Only few variants resistant to heat would be able to survive. If theseRead more
Sometimes for a species, the environmental conditions change so drastically that their
survival becomes difficult. For example, if the temperature of water increases suddenly,
most of the bacteria living in that water would die. Only few variants resistant to heat
would be able to survive. 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, not all variations are useful. Therefore, these are not necessarily beneficial for
the individual organisms.
Let us assume that children with light - coloured eyes can either have LL or Ll or ll genotype. If the children have LL genotype, then their parents will also be of LL genotype. LL × LL ↓ LL If the children with light-coloured eyes have ll genotype, then their parents will also have ll genotype. llRead more
Let us assume that children with light – coloured eyes can either have LL or Ll or ll
genotype. If the children have LL genotype, then their parents will also be of LL genotype.
LL × LL
↓
LL
If the children with light-coloured eyes have ll genotype, then their parents will also have
ll genotype.
ll × ll
↓
ll
Therefore, it cannot be concluded whether light eye colour is dominant or recessive.
Give an example of characteristics being used to determine how close two species are in evolutionary terms.
The presence of feathers in dinosaurs and birds indicates that they are evolutionarily related. Dinosaurs had feathers not for flying but instead these feathers provided insulation to these warm-blooded animals. However, the feathers in birds are used for flight. This proves that reptiles and birdsRead more
The presence of feathers in dinosaurs and birds indicates that they are evolutionarily
related. Dinosaurs had feathers not for flying but instead these feathers provided
insulation to these warm-blooded animals. However, the feathers in birds are used for
flight. This proves that reptiles and birds are closely related and that the evolution of wings
started in reptiles.
For more answers visit to website:
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Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?
Geographical isolation prevents gene flow between populations of a species whereas asexual reproduction generally involves only one individual. In an asexually reproducing organism, variations can occur only when the copying of DNA is not accurate. Therefore, geographical isolation cannot prevent thRead more
Geographical isolation prevents gene flow between populations of a species whereas
asexual reproduction generally involves only one individual. In an asexually reproducing
organism, variations can occur only when the copying of DNA is not accurate. Therefore,
geographical isolation cannot prevent the formation of new species in an asexually
reproducing organism.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/
How does the creation of variations in a species promote survival?
Sometimes for a species, the environmental conditions change so drastically that their survival becomes difficult. For example, if the temperature of water increases suddenly, most of the bacteria living in that water would die. Only few variants resistant to heat would be able to survive. If theseRead more
Sometimes for a species, the environmental conditions change so drastically that their
survival becomes difficult. For example, if the temperature of water increases suddenly,
most of the bacteria living in that water would die. Only few variants resistant to heat
would be able to survive. 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, not all variations are useful. Therefore, these 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-9/
A study found that children with light-coloured eyes are likely to have parents with light-coloured eyes. On this basis, can we say anything about whether the light eye colour trait is dominant or recessive? Why or why not?
Let us assume that children with light - coloured eyes can either have LL or Ll or ll genotype. If the children have LL genotype, then their parents will also be of LL genotype. LL × LL ↓ LL If the children with light-coloured eyes have ll genotype, then their parents will also have ll genotype. llRead more
Let us assume that children with light – coloured eyes can either have LL or Ll or ll
genotype. If the children have LL genotype, then their parents will also be of LL genotype.
LL × LL
↓
LL
If the children with light-coloured eyes have ll genotype, then their parents will also have
ll genotype.
ll × ll
↓
ll
Therefore, it cannot be concluded whether light eye colour is dominant or recessive.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/