Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain Cell - The Basic Unit of Life
You must be aware of the fact that the cell is the basic unit of life. What do you understand by the term 'cell'? What are the components of the cell, its structural features and functions that make it such an essential component of all the living beings? Well, here in this section, we shall study about all these aspects related to cell. What would be the answer to the question what is a cell? Well, a cell is the smallest self-functioning unit found in all the living organisms. Cells may exist as independent units of life (as in monads) or may form colonies or tissues as in the higher plants and animals. Each cell is enclosed by an outer membrane or wall called as the cell membrane. A cell has receptors on its surface which have unique functions and identifying properties. Also, it contains genetic material (DNA) and other parts to carry out its life functions. Within the cell are the nucleus and the cytoplasm. The nucleus contains the genetic material-DNA.
The cytoplasm contains organelles that carry out the cell's functions. We shall read about these components of the cell in a little while from now. An aggregation of cells having a common origin and performing a similar but one or more specific functions in the body constitute a tissue (e.g. muscle). Several types of tissues may join collectively to form an organ that carries out one or more specific functions (e.g., kidney, liver, leaf and roots). In majority of animals, several organs are interrelated to perform a specific function within a multicellular organism and thus constitute an organ-system.
We will learn about this organ systems i.e. gastrointestinal system, renal system in the subsequent units. You would realize that several types of organ-systems in the body of an organism show unique example of division of labor. It is important to note that the cells are not only the building blocks of the body, but are the functional unit of life too. Every cell arises from pre-existing cells. The cells have the same genetic material. It is, therefore, capable of giving rise to a new individual. This potential of the cell to give rise to unlike cells and so to develop a new organism or a part is termed as totipotency. Interestingly, all the activities of an organism are present in miniature form in each and every cell. Therefore, the cell can be called as a basic unit of life and the structural unit of an organism. 'All organisms are composed of cells'. 'All cells come from pre- existing cells'. These two statements constitute the cell theory.
1. The solid wastes from a summer camp with 100 children and a staff of 25 are to be collected once per week. If bottles and cans (representing 20% of the weight) are removed, pape
Explain Active Transport - Mechanism of Urine Formation Active transport: When the substances are transported through a cell membrane against a concentration gradient, that is,
what does mean of BR and RM value of ghee. why one should measure these parameters.
The physical property used in mineral identification for the way a minerals surface reflects light is known as luster
What is Parent material Parent material refers to the primary material from which the soil is formed. The parent material may be either a solid rock, a decomposed rock, organic
Explain the property of Water Water has a significant property called surface tension that markedly influences its behaviour in soils and may be measured by level of water rise
In Fehling's Test The free sugar group (aldehyde or ketone) reduces the Cu (cupric) ions in an alkaline environment to form Cu 10 (cuprous oxide) and the sugar is itself ox
how effective is the LION KING movie in meeting the standards that relate to how energy flows through an ecosystem and how earth is inter connected?
in a reaction 5.3g of sodium carbonate reacted with 6g of ethanic acid. theproducts were 2.2 g of carbon dioxide , 0.9g water and 8.2 g of sodium ethanoate, show that these observa
is a grassland a type of landform
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd