Evolution cannot always be equated with progress or better body designs. Evolution simply creates more complex body designs. However, this does not mean that the simple body designs are inefficient. In fact, bacteria having a simple body design are still the most cosmopolitan organisms found on eartRead more
Evolution cannot always be equated with progress or better body designs. Evolution simply
creates more complex body designs. However, this does not mean that the simple body
designs are inefficient. In fact, bacteria having a simple body design are still the most
cosmopolitan organisms found on earth. They can survive hot springs, deep sea, and even
freezing environment.
Therefore, bacteria, spiders, fish, and chimpanzees are all different branches of evolution.
A species is a group of organisms that are capable of interbreeding to produce a fertile offspring. Skin colour, looks, and size are all variety of features present in human beings. These features are generally environmentally controlled. Various human races are formed based on these features. HowevRead more
A species is a group of organisms that are capable of interbreeding to produce a fertile
offspring. Skin colour, looks, and size are all variety of features present in human beings.
These features are generally environmentally controlled. Various human races are formed
based on these features. However, there is no biological basis to this concept of races.
Therefore, all human beings are a single species as humans of different colour, size, and
looks are capable of reproduction and can produce a fertile offspring.
Fossils are the remains of organisms that once existed on earth. They represent the ancestors of plants and animals that are alive today. They provide evidences of evolution by revealing the characteristics of the past organism and the changes that have occurred in these organisms to give rise to thRead more
Fossils are the remains of organisms that once existed on earth. They represent the
ancestors of plants and animals that are alive today. They provide evidences of evolution
by revealing the characteristics of the past organism and the changes that have occurred
in these organisms to give rise to the present organisms.
Wings of a butterfly are composed of membrane, while wings of a bat are composed of bony skeleton. Hence, these are not homologous organs rather analogous organs. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/
Wings of a butterfly are composed of membrane, while wings of a bat are composed of
bony skeleton.
Hence, these are not homologous organs rather analogous organs.
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.
In evolutionary terms, can we say which among bacteria, spiders, fish and chimpanzees have a ‘better’ body design? Why or why not?
Evolution cannot always be equated with progress or better body designs. Evolution simply creates more complex body designs. However, this does not mean that the simple body designs are inefficient. In fact, bacteria having a simple body design are still the most cosmopolitan organisms found on eartRead more
Evolution cannot always be equated with progress or better body designs. Evolution simply
creates more complex body designs. However, this does not mean that the simple body
designs are inefficient. In fact, bacteria having a simple body design are still the most
cosmopolitan organisms found on earth. They can survive hot springs, deep sea, and even
freezing environment.
Therefore, bacteria, spiders, fish, and chimpanzees are all different branches of evolution.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/
Why are human beings who look so different from each other in terms of size, colour and looks said to belong to the same species?
A species is a group of organisms that are capable of interbreeding to produce a fertile offspring. Skin colour, looks, and size are all variety of features present in human beings. These features are generally environmentally controlled. Various human races are formed based on these features. HowevRead more
A species is a group of organisms that are capable of interbreeding to produce a fertile
offspring. Skin colour, looks, and size are all variety of features present in human beings.
These features are generally environmentally controlled. Various human races are formed
based on these features. However, there is no biological basis to this concept of races.
Therefore, all human beings are a single species as humans of different colour, size, and
looks are capable of reproduction and can produce a fertile offspring.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/
What are fossils? What do they tell us about the process of evolution?
Fossils are the remains of organisms that once existed on earth. They represent the ancestors of plants and animals that are alive today. They provide evidences of evolution by revealing the characteristics of the past organism and the changes that have occurred in these organisms to give rise to thRead more
Fossils are the remains of organisms that once existed on earth. They represent the
ancestors of plants and animals that are alive today. They provide evidences of evolution
by revealing the characteristics of the past organism and the changes that have occurred
in these organisms to give rise to the present organisms.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Wings of a butterfly are composed of membrane, while wings of a bat are composed of bony skeleton. Hence, these are not homologous organs rather analogous organs. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/
Wings of a butterfly are composed of membrane, while wings of a bat are composed of
bony skeleton.
Hence, these are not homologous organs rather analogous organs.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/
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:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-9/