An organism which is simple is called primitive. On the other hand, an organism with high level of division of labour, by formation of organs and organ system is called advanced. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
An organism which is simple is called primitive. On the other hand, an organism with high level
of division of labour, by formation of organs and organ system is called advanced.
Plants are autotrophs, while animals are heterotrophs. Cell wall is present in plant cells, while it is absent in animal cells. Plants do not need to move from one place to another, while most of the animals need to move in search of food. For more answers visit to website: https://www.tiwariacademyRead more
Plants are autotrophs, while animals are heterotrophs. Cell wall is present in plant cells, while it is absent in animal cells. Plants do not need to move from one place to another, while most of the animals need to move in search of food.
Organisation of nucleus is the primary characteristic on which the first division of organisms is made. Based on this, organisms can be either prokaryotic or eukaryotic. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
Organisation of nucleus is the primary characteristic on which the first division of organisms is
made. Based on this, organisms can be either prokaryotic or eukaryotic.
The kind of cells an organism is made of is more basic characteristic of classifying organism because it gives a scientific angle to classification. Moreover, a particular dwelling place can be full of organisms of a wide variety. For more answers visit to website: https://www.tiwariacademy.com/ncerRead more
The kind of cells an organism is made of is more basic characteristic of classifying organism
because it gives a scientific angle to classification. Moreover, a particular dwelling place can be
full of organisms of a wide variety.
Three examples of the range of variations in life forms: - Ants, cockroaches, spiders, houseflies, etc. live in the same building. They look entirely different from each other yet all of them belong to arthropoda. - Humans, monkeys, cats and dogs lives in the same neighbourhood. They look entirely dRead more
Three examples of the range of variations in life forms:
– Ants, cockroaches, spiders, houseflies, etc. live in the same building. They look entirely different
from each other yet all of them belong to arthropoda.
– Humans, monkeys, cats and dogs lives in the same neighbourhood. They look entirely different
yet all of them belong to mammalia.
– A nearby park may show wide variety of plants; right from small grass to a giant banyan tree.
There are millions of species on this earth. For anybody, it is impossible to study about each of them in his lifetime. Classification makes it easy to study the organisms; on the basis of certain common characters. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/claRead more
There are millions of species on this earth. For anybody, it is impossible to study about each of
them in his lifetime. Classification makes it easy to study the organisms; on the basis of certain
common characters.
The cork cells are dead cells and do not have any intercellular spaces. The cell wall of the cork cells are coated with suberin (a waxy substance). Suberin makes these cells impermeable to water and gases. Cork is protective in function; it protects underlying tissues from desiccation, infection andRead more
The cork cells are dead cells and do not have any intercellular spaces. The cell wall of the cork cells are coated with suberin (a waxy substance). Suberin makes these cells impermeable to water and gases. Cork is protective in function; it protects underlying tissues from desiccation, infection and mechanical injury.
Epidermis is a protective tissue of angiospermic plants. It provides protections to underlying tissues. Epidermis forms outer covering of various plant organs such as roots, stem, leaves, and flowers and remains in direct contact with the environment. Any substance whether solid, liquid or gas can eRead more
Epidermis is a protective tissue of angiospermic plants. It provides protections to underlying tissues. Epidermis forms outer covering of various plant organs such as roots, stem, leaves, and flowers and remains in direct contact with the environment. Any substance whether solid, liquid or gas can enter into the plant or move outside only after passing through this layer. Epidermis helps in absorption, secretion, gaseous exchange and transpiration. It helps in preventing the entry of pathogens.
Parenchyma is a simple permanent tissue of angiospermic plants. It is present in cortex and pith of stem and roots. It is also present in mesophyll of leaves. When it contains chlorophyll, it is called Chlorenchyma, found in green leaves. For more answers visit to website: https://www.tiwariacademy.Read more
Parenchyma is a simple permanent tissue of angiospermic plants. It is present in cortex and pith of stem and roots. It is also present in mesophyll of leaves. When it contains chlorophyll, it is called Chlorenchyma, found in green leaves.
Which organisms are called primitive and how are they different from the so-called advanced organisms?
An organism which is simple is called primitive. On the other hand, an organism with high level of division of labour, by formation of organs and organ system is called advanced. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
An organism which is simple is called primitive. On the other hand, an organism with high level
of division of labour, by formation of organs and organ system is called advanced.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
On what bases are plants and animals put into different categories?
Plants are autotrophs, while animals are heterotrophs. Cell wall is present in plant cells, while it is absent in animal cells. Plants do not need to move from one place to another, while most of the animals need to move in search of food. For more answers visit to website: https://www.tiwariacademyRead more
Plants are autotrophs, while animals are heterotrophs. Cell wall is present in plant cells, while it is absent in animal cells. Plants do not need to move from one place to another, while most of the animals need to move in search of food.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
What is the primary characteristic on which the first division of organisms is made?
Organisation of nucleus is the primary characteristic on which the first division of organisms is made. Based on this, organisms can be either prokaryotic or eukaryotic. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
Organisation of nucleus is the primary characteristic on which the first division of organisms is
made. Based on this, organisms can be either prokaryotic or eukaryotic.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
Which do you think is a more basic characteristic for classifying organisms?
The kind of cells an organism is made of is more basic characteristic of classifying organism because it gives a scientific angle to classification. Moreover, a particular dwelling place can be full of organisms of a wide variety. For more answers visit to website: https://www.tiwariacademy.com/ncerRead more
The kind of cells an organism is made of is more basic characteristic of classifying organism
because it gives a scientific angle to classification. Moreover, a particular dwelling place can be
full of organisms of a wide variety.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
Give three examples of the range of variations that you see in lifeforms around you.
Three examples of the range of variations in life forms: - Ants, cockroaches, spiders, houseflies, etc. live in the same building. They look entirely different from each other yet all of them belong to arthropoda. - Humans, monkeys, cats and dogs lives in the same neighbourhood. They look entirely dRead more
Three examples of the range of variations in life forms:
– Ants, cockroaches, spiders, houseflies, etc. live in the same building. They look entirely different
from each other yet all of them belong to arthropoda.
– Humans, monkeys, cats and dogs lives in the same neighbourhood. They look entirely different
yet all of them belong to mammalia.
– A nearby park may show wide variety of plants; right from small grass to a giant banyan tree.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
Why do we classify organisms?
There are millions of species on this earth. For anybody, it is impossible to study about each of them in his lifetime. Classification makes it easy to study the organisms; on the basis of certain common characters. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/claRead more
There are millions of species on this earth. For anybody, it is impossible to study about each of
them in his lifetime. Classification makes it easy to study the organisms; on the basis of certain
common characters.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
How does the cork act as a protective tissue?
The cork cells are dead cells and do not have any intercellular spaces. The cell wall of the cork cells are coated with suberin (a waxy substance). Suberin makes these cells impermeable to water and gases. Cork is protective in function; it protects underlying tissues from desiccation, infection andRead more
The cork cells are dead cells and do not have any intercellular spaces. The cell wall of the cork cells are coated with suberin (a waxy substance). Suberin makes these cells impermeable to water and gases. Cork is protective in function; it protects underlying tissues from desiccation, infection and mechanical injury.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-6/
What is the role of epidermis in plants?
Epidermis is a protective tissue of angiospermic plants. It provides protections to underlying tissues. Epidermis forms outer covering of various plant organs such as roots, stem, leaves, and flowers and remains in direct contact with the environment. Any substance whether solid, liquid or gas can eRead more
Epidermis is a protective tissue of angiospermic plants. It provides protections to underlying tissues. Epidermis forms outer covering of various plant organs such as roots, stem, leaves, and flowers and remains in direct contact with the environment. Any substance whether solid, liquid or gas can enter into the plant or move outside only after passing through this layer. Epidermis helps in absorption, secretion, gaseous exchange and transpiration. It helps in preventing the entry of pathogens.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-6/
Name the regions in which parenchyma tissue is present.
Parenchyma is a simple permanent tissue of angiospermic plants. It is present in cortex and pith of stem and roots. It is also present in mesophyll of leaves. When it contains chlorophyll, it is called Chlorenchyma, found in green leaves. For more answers visit to website: https://www.tiwariacademy.Read more
Parenchyma is a simple permanent tissue of angiospermic plants. It is present in cortex and pith of stem and roots. It is also present in mesophyll of leaves. When it contains chlorophyll, it is called Chlorenchyma, found in green leaves.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-6/
Identify the type of tissue in the following: skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
• Skin - Stratified Squamous epithelium • Bark of tree - Cork protective tissue • Bone - Connective tissue • Lining of kidney tubule - Cuboidal epithelium (Cuboidal epithelial tissue) • Vascular bundle - Complex permanent tissue (Xylem and Phloem) For more answers visit to website: https://www.tiwarRead more
• Skin – Stratified Squamous epithelium
• Bark of tree – Cork protective tissue
• Bone – Connective tissue
• Lining of kidney tubule – Cuboidal epithelium (Cuboidal epithelial tissue)
• Vascular bundle – Complex permanent tissue (Xylem and Phloem)
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-6/