Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by 《Aruba》°°° 《Sayed》❤ 3 years, 11 months ago
- 5 answers
Posted by Tanisha Dahiya 3 years, 11 months ago
- 3 answers
Bhavya Madaan 3 years, 11 months ago
Likhita Gvk 3 years, 11 months ago
Posted by Shailza Dahiya 3 years, 11 months ago
- 2 answers
Yogita Ingle 3 years, 11 months ago
It is defined as the separation process in which two immiscible liquids are separated. This is done by pouring out the clear upper layer of liquid. Separation of a mixture of oil from water is an example of decantation.
Example
This process can also be used to separate two liquids that do not mix e.g., oil and water. When we leave the mixture of oil and water, two separate layers are formed, with water at the bottom and oil, being lighter, at the top. We can remove the oil layer from the top by pouring it into another vessel, which leaves us with the water layer at the bottom.
Posted by Gravit Kulhari 3 years, 11 months ago
- 2 answers
Gravit Kulhari 3 years, 11 months ago
Yogita Ingle 3 years, 11 months ago
R. H. Whittaker proposed the five kingdom classification. The five kingdom classification are- Monera, Protista, Fungi, Plantae and Animalia. The organisms which are placed under the kingdom Animalia are heterotrophic and depend on the other organisms for food. These are eukaryotic organisms with well-developed organelles. These are multicellular organisms which are composed of many cells and can perform activities like locomotion.
Posted by Preeti Verma 3 years, 11 months ago
- 3 answers
Posted by Bharat Malik 3 years, 11 months ago
- 2 answers
Gaurav Seth 3 years, 11 months ago
Vacuoles
They are storage sacs for solid or liquid content.In animals cell,they are small and temporary.They store water,glycogen and proteins,single membrane maintain water balance.
In plant cell they are large distinct and permanent.The vacuole is bounded by a membrane called Tonoplast.
It is filled with cell sap(Watery substance rich in sugar,amino acids,proteins,minerals).they provide rigidity and turgidity to cell.
Posted by Ganpat Ray 3 years, 11 months ago
- 0 answers
Posted by Dhruvraj Gohil 3 years, 11 months ago
- 1 answers
Yogita Ingle 3 years, 11 months ago
Features of parenchyma:
- They form basic packing tissue.
- Cells of this tissue are relatively unspecialised and may be oval, rounded or elongated in shape.
- Their cell walls are thin.
- These cells are living.
- They show large intercellular spaces.
- Cytoplasm is dense with a small nucleus.
- The celss possess a large central vacuole.
- Parenchyma provides support to plants and also stores food
Features of Sclerenchyma:
- Their cells are dead.
- Cells are long and narrow.
- Cells are empty and devoid of protoplasm.
- Cell walls are highly thickened due to lignin deposition.
- There is no internal space inside the cell.
- Cells are closely packed, with no intercellular spaces.
- It is a strengthening or mechanical tissue.
Features of collenchyma:
- They possess living cells.
- It shows deposition of extra cellulose at the corners of the cells.
- Intercellular spaces are generally absenjt.
- Their cells are elongated in shape.
Posted by Dhruvraj Gohil 3 years, 11 months ago
- 2 answers
Yogita Ingle 3 years, 11 months ago
Meristematic tissue is the plant tissue that has the ability to divide actively throughout its life.
The meristematic tissue is of the following types:
Meristematic Tissue On the basis of Origin
Promeristem
-
The earliest and youngest meristematic tissue.
-
It originates from the embryo.
-
The primary meristem arises from the promeristem.
-
It is found in the root and the shoot tips.
Primary Meristem
-
It arises from the promeristem.
-
Cells divide actively.
-
It is present below the promeristem and forms the permanent tissue.
Secondary Meristem
-
It originates from the primary meristem.
-
The permanent tissue forms from the secondary meristem.
Meristematic Tissue On the Basis of Position
Apical Meristem
-
These are present at the tips of the roots and shoots and helps in the increase of the height of the plants.
-
Various cell divisions facilitate the growth of the cells in the roots and shoots and help in cellular enlargement.
-
Apical meristem is divided into-promeristem zone, which contains actively dividing cells, and the meristematic zone, which contains protoderm, procambium and ground meristem.
Intercalary Meristem
-
It is located in the leaves and internodes at the intercalary position.
-
These help to increase the length of the internode.
-
It is found in grass, monocots and pines.
-
It is a part of apical meristem and adds to the height of the plant.
Lateral Meristem
-
It is located in the stems and roots on the lateral side.
-
It increases the thickness of the plant.
-
Vascular cambium and cork cambium are the two lateral meristems.
-
These divide preclinically or radially and give rise to secondary permanent tissues.
Meristematic Tissue On the Basis of Function
Protoderm
-
It is the outermost plant tissue and forms the epidermis.
-
It protects the plants from any mechanical shocks.
Procambium
-
It is the innermost tissue and gives rise to xylem and phloem.
- It helps in the transport of water and nutrients to different parts of the plant.
Ground Meristem
-
The cells are large with thick walls.
- It forms the cortex, pericycle and pith.
ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 3 years, 11 months ago
Posted by Neha Jangid ??? 3 years, 11 months ago
- 0 answers
Posted by C Abbi 3 years, 11 months ago
- 5 answers
Posted by Abhyudaya Sinha 3 years, 11 months ago
- 1 answers
ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 3 years, 11 months ago
Posted by Anushka Verma 3 years, 11 months ago
- 1 answers
ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 3 years, 11 months ago
Posted by Ritika Jangra 3 years, 11 months ago
- 5 answers
Posted by Anshul Rana 3 years, 11 months ago
- 1 answers
Gaurav Seth 3 years, 11 months ago
Let the mass of an object be m. Let its weight on the moon be Wm. Let the mass of the moon be Mm and its radius be Rm. By applying the universal law of gravitation, the weight of the object on the moon will be
Let the weight of the same object on the earth be We. The mass of earth is M and its radius is R.
Substituting the values in equations (1) and (2) we get
Dividing equation (3) by (4)
Posted by Neha Jangid ??? 3 years, 11 months ago
- 3 answers
Posted by Neha Jangid ??? 3 years, 11 months ago
- 4 answers
Posted by Amy Purple 3 years, 11 months ago
- 2 answers
Tillu Yadav 3 years, 11 months ago
Meghna Thapar 3 years, 11 months ago
Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four *** cells. Mitosis gives identical cells to each other and to the mother cell, while meiosis leads to genetic variation due to crossing over and independent assortment. Mitosis gives nuclei with the same number of chromosomes as the mother cell while meiosis gives cells with half the number.
Posted by Shagun Panwar 3 years, 11 months ago
- 4 answers
Payal Nandini 3 years, 11 months ago
Jividha Kumar 3 years, 11 months ago
Yogita Ingle 3 years, 11 months ago
Centrifugation is a technique used in a washing machine to squeeze out water from wet clothes while drying.
Gaurav Seth 3 years, 11 months ago
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
SOLUTION
Centrifugation is a technique used in a washing machine to squeeze out water from wet clothes while drying.
Posted by Hoikhanmoi Guite 3 years, 11 months ago
- 1 answers
ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 3 years, 11 months ago
Posted by Joyeeta Mondal 3 years, 11 months ago
- 2 answers
Meghna Thapar 3 years, 11 months ago
Meristematic tissues are growth tissues and found in the growing regions of the plant. According to their position in plant, meristems are apical, lateral and intercalary.
- Apical meristem - Apical meristem is present at the growing tips of stems and roots and increases the length of the stem and the root.
- Lateral meristem – Lateral meristems are found beneath the bark. The girth of the stem or root increases due to lateral meristem (cambium).
- Intercalary meristem - Intercalary meristem is the meristem at the base of the leaves or internodes (on either side of the node) on twigs. It increases the length of the organs such as leaves and internodes.
Posted by Joyeeta Mondal 3 years, 11 months ago
- 1 answers
Yogita Ingle 3 years, 11 months ago
The parenchyma is widely distributed in plant body such as stem , roots, leaves, flowers and fruits.
The parenchyma tissue is found in the soft parts of the plants such as cortex of roots, ground tissue in stems & mesophyll of leaves.
It is also distributed in pith , medullary rays & packing tissue in xylem and phloem.
They forms the bulk of the plant body they are living and possesses the power of their division. Parenchyma cells have living Protoplasm.
Posted by Joyeeta Mondal 3 years, 11 months ago
- 1 answers
Yogita Ingle 3 years, 11 months ago
| Golgi Bodies vs Mitochondria | |
| Golgi Bodies are a type of organelles in eukaryotic cells. They are stacks of flattened membranes and vesicles. | Mitochondria are organelles in eukaryotic cells They are of bean shape, double membranous organelles. |
| Major Function | |
| Involve in modifying, sorting and packaging of proteins for secretion. | Produce energy currency (ATP) of the cell. |
| DNA | |
| Do not have DNA. | DNA is available. |
| Number of Membranes Surrounding the Organelle | |
| Single membrane organelles. | Double membrane bound organelles. |
| Shape | |
| Stacks of flattened membranous sacs or cisternae. They appear as a maze. | Bean-shaped organelles. |
Posted by Tanusha Noushad 3 years, 11 months ago
- 2 answers
Ishita Budhwar 3 years, 11 months ago
Gaurav Seth 3 years, 11 months ago
Mixtures which do not have uniform composition throughout are called Heterogeneous Mixture. For example – mixture of soil and sand, mixture of sulphur and iron fillings, mixture of oil and water etc. The boundaries of constituent particles of a homogeneous mixture can be identified easily; as a homogeneous mixture has two or more distinct phases.
Posted by Likhith Manohar Vadapalli 3 years, 11 months ago
- 1 answers
Gaurav Seth 3 years, 11 months ago
mass of earth = 6 × 10²⁴ Kg
mass of sun = 2 × 10^30 Kg
distance between earth and sun = 1.5 × 10¹¹ m
F = GMm/r²
= 6.67 × 10-¹¹ × 6 × 10²⁴ × 2 × 10^30/(1.5 × 10¹¹)²
= { 6.67 × 6 × 2/2.25} × 10¹³ × 10^30× 10-²²
= 35.57 × 10²¹ N
= 3.557 × 10²² N
Posted by Vishesh Chahar 3 years, 11 months ago
- 1 answers
Arya Bharambe 3 years, 11 months ago
Posted by Chaitali 1612 3 years, 11 months ago
- 5 answers
Posted by Neha Jangid ??? 3 years, 11 months ago
- 5 answers
Posted by Ritika Jangra 3 years, 11 months ago
- 5 answers
Posted by Ritika Jangra 3 years, 11 months ago
- 4 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
《Aruba》°°° 《Sayed》❤ 3 years, 11 months ago
0Thank You