Facts that Matter. •
The smallest functional unit of life is cell
, discovered by Robert Hooke in 1665. A cell can independently perform all necessary activities to sustain life. Hence cell is the basic unit of life.
What is a cell class 9 Ncert?
A
cell is able to live and perform all its functions
because of these organelles. These organelles together constitute the basic unit called the cell. It is interesting that all cells are found to have the same organelles, no matter what their function is or what organism they are found in. uestions.
What is a cell?
In biology,
the smallest unit that can live on its own
and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and controls the substances that go into and out of the cell.
What is a cell answer?
Cell is
the smallest structural and functional unit of an organism
. It is the building block of a living organism. It is membrane bound and is made up of the cytoplasm, genetic material and other cell organelles. hope it helps you.
What is a cell class 9 short answer?
Answer: A
cell is capable of carrying out all the life functions
; such as nutrition, excretion, respiration, etc. Hence a cell is called the functional unit of life. Additionally, the cell is the smallest unit of life and all the living beings are made up of cells. Hence a cell is called the structural unit of life.
What are parts of cell?
A cell consists of three parts:
the cell membrane, the nucleus, and, between the two, the cytoplasm
. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
What is example of cell?
A cell is defined as the smallest unit of an organism with a nucleus. An example of a cell is
a unit in the tissue of an animal muscle
. A small enclosed cavity or space, such as a compartment in a honeycomb or within a plant ovary or an area bordered by veins in an insect’s wing.
What are cisterns Class 9?
Answer:
A reservoir or a closed space filled with body fluid like chyle, lymph, or cerebrospinal fluid etc
is called cistern.
What is endocytosis class 9th?
Endocytosis is defined as
the process of trapping a particle or even a substance from the external environment by the process of engulfing it
. The flexibility of the cell membrane helps the cell to engulf the food and also other materials from the external environment. Such a process is called endocytosis.
What are cisterns in biology class 9?
cisterns are
flattened plate like structures that make up the golgi body
. They are stacked upon each other (usually 6 together). It helps to carry enzymes and cargo proteins to other cell destinations.
What is cell with diagram?
Cells are the smallest form of life; the functional and structural units of all living things. … The diagram
shows the structures visible within a cell at high magnification
. The structures form the ultrastructure of the cell. Figure 2.9: Diagram of the cell ultrastructure of an animal cell.
What is cell answer in one word?
Cell is the structural and functional unit of an living organism. In other words, (only for better understanding) Cell is
the building blocks of an living organism
.
What is the smallest cell?
As of today,
the mycoplasmas
are thought to be the smallest living cells in the biological world (Fig. 1). They have a minimal size of approximately 0.2 micrometers, which makes them smaller than some of the poxviruses.
What is a Nucleoid Class 9?
Nucleoid is
the undefined nuclear region containing only nucleic acids
, in the prokaryotic cells. It is not bounded by a nuclear membrane and lies in direct contact with the cytoplasm. … It transports the material in and out of the cell. It is also reponsible for the formation of lysosomes.
What is protoplasm Class 9?
Hint: Protoplasm is considered as
the living part of the cell
. … It comprises different cellular organelles. It is a jelly-like, colorless, transparent, and viscous living substance present within the cell wall.
Who proposed cell theory class 9?
Complete answer: Cell theory was put forward by a famous
German botanist- Matthias Schleiden and an English zoologist- Theodor Schwann
in the year 1839. It has the following propositions: 1) Cells are the basic unit of life and they are therefore considered to be the building blocks of living organisms.
