BIOSCIENCE
CLASS: VIII
TOTAL: 30
I.FILL IN THE BLANKS:
1.
are known as building block of life.
2
observed the cells of the first time which
studying dead cork cells.
or
makes us easy to study the detailed
3.
structure of cell.
4. When group of tissues are present,
is formed. .
5. The shape of RBC's is
6. Oval shaped stomata is surrounded by kidney shaped
Answers
Answer:
HEY MATE
YOUR ANSWER:-
1-Carbon is the universal building block for life as we know it. Its ability to form complex, stable molecules with itself and other elements, particularly hydrogen, oxygen, and nitrogen is unique.
2-Robert Hooke observed cork cells for the first time. They looked like box-type structures under the microscope. Cork is obtained from bark of a tree.
3-By development of microscope at every level made us possible to make a deep and a detailed study about the cell.
4-Complete answer: The Group of tissues performing particular functions in the body is called an organ or an organ is a structure composed of at least two or more tissue types. Each tissue performs a specific function of the body. Several organs together constitute an organ system.
5-biconcave disc
The shape of the human red blood cell (RBC) is known to be a biconcave disc. The experiments in this paper identify some of the underlying determinates.
6-A stoma (stomata) is a tiny opening or pore that is used for gas exchange. They are found on the under-surface of plant leaves. Each stoma remains surrounded by two kidneys or bean shaped epidermal cells the guard cells.
These adjust the size of the opening by opening or closing.
Air enters the plant through these openings. Also, water vapor goes into the atmosphere through these pores in transpiration
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