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Ask QuestionPosted by Amisha Verma 5 years ago
- 4 answers
Divyansh Jain 5 years ago
Gaurav Seth 5 years ago
- Reproduction is the process of giving rise to an offspring.
- Reproduction is essential for the continuation of a species.
- There are two modes of reproduction:
- Sexual reproduction and
- Asexual reproduction
Posted by Aishwarya Wagh 5 years ago
- 1 answers
Gaurav Seth 5 years ago
- One example of the arbitrariness that continued to exist as part of British law is the Sedition Act of 1870. The idea of sedition was very broadly understood within this Act. Any person protesting or criticising the British government could be arrested without due trial.
- Another example of British arbitrariness was the Rowlatt Act which allowed the British government to imprison people without due tria
Posted by Praveen Kumar 5 years ago
- 2 answers
Posted by Smitha Smitha 5 years ago
- 5 answers
Prachi Saxena 5 years ago
Ram Budania 5 years ago
Avinash Singh 5 years ago
Aishwarya Wagh 5 years ago
Yogita Ingle 5 years ago
Hormones are chemicals synthesized and produced by the specialized glands to control and regulate the activity of certain cells and organs. These specialized glands are known as endocrine glands.
Posted by Sundram Jha 5 years ago
- 2 answers
Yogita Ingle 5 years ago
Square is inscribed in circle so diagonal of square is equal to diameter of circle
dimeter of circle =2×7 =14
diagonal of square = diameter = 14
so ..area of square = 1/2 × (diagonal)2
=1/2 × 196
= 98 sq.cm
Posted by Yogita Yogita 5 years ago
- 0 answers
Posted by Sakshi Chouhan 5 years ago
- 1 answers
Gaurav Seth 5 years ago
A cell is the structural and fundamental unit of life. The study of cells from its basic structure to the functions of every cell organelle is called Cell Biology. Robert Hooke was the first Biologist who discovered cells.
Cell Structure
The cell structure comprises individual components with specific functions essential to carry out life’s processes. These components include- cell wall, cell membrane, cytoplasm, nucleus, and cell organelles. Read on to explore more insights on cell structure and function.
Cell Membrane
- The cell membrane supports and protects the cell. It controls the movement of substances in and out of the cells. It separates the cell from the external environment. The cell membrane is present in all the cells.
- The cell membrane is the outer covering of a cell within which all other organelles, such as the cytoplasm and nucleus, are enclosed. It is also referred to as the plasma membrane.
- By structure, it is a porous membrane (with pores) which permit the movement of selective substances in and out of the cell. Besides this, the cell membrane also protects the cellular component from damage and leakage.
- It forms the wall-like structure between two cells as well as between the cell and its surroundings.
- Plants are immobile, so their cell structures are well-adapted to protect them from external factors. The cell wall helps to reinforce this function.
Cell Wall
- The cell wall is the most prominent part of the plant’s cell structure. It is made up of cellulose, hemicellulose and pectin.
- The cell wall is present exclusively in plant cells. It protects the plasma membrane and other cellular components. The cell wall is also the outermost layer of plant cells.
- It is a rigid and stiff structure surrounding the cell membrane.
- It provides shape and support to the cells and protects them from mechanical shocks and injuries.
Cytoplasm
- The cytoplasm is a thick, clear, jelly-like substance present inside the cell membrane.
- Most of the chemical reactions within a cell take place in this cytoplasm.
- The cell organelles such as endoplasmic reticulum, vacuoles, mitochondria, ribosomes, are suspended in this cytoplasm.
Nucleus
- The nucleus contains the hereditary material of the cell, the DNA.
- It sends signals to the cells to grow, mature, divide and die.
- The nucleus is surrounded by the nuclear envelope that separates the DNA from the rest of the cell.
- The nucleus protects the DNA and is an integral component of a plant’s cell structure.
Posted by Shreya Pathak 5 years ago
- 1 answers
Gaurav Seth 5 years ago
Here P = Rs 8000, T = 1 year, R = 9% p.a.
Interest is compounded half yearly,
∴ T = 1 year = 2 half years
R = 9% p.a.= 
half yearly
∵ Amount = 
= Rs 8000 
= Rs. 
= Rs 
CI = Rs 8736.20 - Rs 8000
= Rs 736.20
Posted by Diksha Laniya🐥 5 years ago
- 5 answers
Gaurav Seth 5 years ago
Decrease
Oils, grease, graphite, etc., are examples of lubricants. These form a thin layer between the two surfaces in contact thus avoiding them from scrubbing directly against each other. This makes the movement smooth and reduces friction.
Sakshi Chouhan 5 years ago
Posted by Diksha Laniya🐥 5 years ago
- 3 answers
Gaurav Seth 5 years ago
Gravitational force
Gravitational force is a force exerted by the earth on all objects on it. When a ball is thrown up, it falls to the ground because of gravitational force. The water from a tap always flows downwards because of gravitational force.
Posted by Diksha Laniya🐥 5 years ago
- 5 answers
Gaurav Seth 5 years ago
drag
The frictional force exerted by a fluid is called drag.
Drag is a kind of frictional force exerted by fluid which opposes the motion of an object through that fluid.
Posted by V.Bavana Bavana 5 years ago
- 1 answers
Posted by Diksha Laniya🐥 5 years ago
- 4 answers
Gaurav Seth 5 years ago
Non-contact forces: Forces that arise without the contact of 2 or more objects involved. Examples: Magnetic Force, Electrostatic Force, Gravitational force.
Magnetic Force is a force that attracts certain metal objects (like iron and iron filings) towards a magnet.
Electrostatic force is the force exerted by a charged body on another charged or uncharged body. Eg: Take a comb and brush it on a hair 3-4 times and then take it near some small bits of paper. Donot touch the comb with the paper. The bits of paper would get attracted to the comb. This is because the comb is charged because of the rubbing on your hair and it attracts uncharged objects like paper.
Gravitational force is a force exerted by the earth on all objects on it. When a ball is thrown up, it falls to the ground because of gravitational force. The water from a tap always flows downwards because of gravitational force.
Posted by Armaandeep Singh 5 years ago
- 2 answers
Posted by Diksha Laniya🐥 5 years ago
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Posted by Diksha Laniya🐥 5 years ago
- 2 answers
Posted by Piyush Pal 5 years ago
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Posted by Diksha Laniya🐥 5 years ago
- 4 answers
Drishti Ranjan 5 years ago
Posted by Diksha Laniya🐥 5 years ago
- 2 answers
Yogita Ingle 5 years ago
True
Estrogen is widely secreted and released by a pair of ovaries in the female gonad and only a small amount of estrogen is released by the adrenal glands and fat cells, which is responsible for sexual and reproductive development during puberty.
Posted by Puja Kumari 5 years ago
- 5 answers
Zunaid Hrder 4 years, 11 months ago
Gaurav Seth 5 years ago
Reproduction means to reproduce. It is a biological process by which an organism reproduces an offspring who is biologically similar to the organism. Reproduction enables and ensures the continuity of species, generation after generation. It is the main feature of life on earth.
Yogita Ingle 5 years ago
Reproduction is the process by which living organisms produce more living organisms of its own kind.
Shruti ? 5 years ago
Posted by Diksha Laniya🐥 5 years ago
- 3 answers
Yogita Ingle 5 years ago
True
Humans are diploid (2n) and have 46 chromosomes in their normal body cells. These 46 chromosomes are organized into 23 pairs: 22 pairs of autosomes and 1 pair of *** chromosomes.
Posted by Diksha Laniya🐥 5 years ago
- 2 answers
Posted by Shahinur Islam 5 years ago
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Akshay Gorle 5 years ago
Posted by Diksha Laniya🐥 5 years ago
- 4 answers
Gaurav Seth 5 years ago
Internal fertilization occurs in many animals including humans, cows, dogs and hens.
Fertilization which takes place inside the female body is called internal fertilization. Internal fertilization occurs in many animals including humans, cows, dogs and hens. In many animals fertilization takes place outside the body of the female. In these animals, fertilization takes place in water
Posted by Diksha Laniya🐥 5 years ago
- 2 answers
Gaurav Seth 5 years ago
The normal duration it takes for the development of the fetus from the time of fertilization in the womb of its mother is called the gestation period. In humans, the gestation period is for about 9 months or approximately 280 days. It is calculated from the incipience of their last menstrual period.
Posted by Diksha Laniya🐥 5 years ago
- 2 answers
Gaurav Seth 5 years ago
The type of reproduction in which only a single parent is involved is called asexual reproduction
In asexual reproduction, only one parent is involved. Get permanent slides of hydra,Observe them using hand lens or a microscope. Look out for any bulges from the parent body. Count the number of bulges that you see in different slides. Also, note the size of the bulges.
Posted by Diksha Laniya🐥 5 years ago
- 4 answers
Gaurav Seth 5 years ago
Fertilization
Fertilization is the process of fusion of a sperm with an ovum. The union of sperm and egg results in the formation of zygote or fertilized egg. In humans, it usually occurs in the fallopian tube. Usually, one sperm fertilizes the ovum. However, there are chances of more than one sperm fertilizing with an ovum. The phenomenon is called as polyspermy.
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Bani Singh Bani Singh 5 years ago
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