Answer: <u>123.5 μm</u>
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(a) Total power of magnification 100x because ocular lens is 10x magnification maultiplied by 10x objective lens.
(b) Widht of the onion cell can be calculated as follows:
If the number of units observed for an onion cell through ocular micrometer (10x) under microscope is 'A'.
Then, the widht of the cell will become = A X 9.5 (Calibration factor of ocular unit and total power fo magnification is 100x)
So, for example if the observation through ocular micrometer is 13, then the widht of the onion cell will be = 13 X 9.5 = 123.5 μm
D. Genes. They have genetic material that determine our characteristics.
Answer:
A) Elastin
Explanation:
Elastin is the principle load-bearing protien present in the wall of aorta. It is the protien which coil and recoils like a spring within the elastic fibres and accounts for elasticity of blood vessels. As during excerise , afterload is increased ,thus a stretch is produced in the vessels. Similarly im warm environment the vessels dilate this this stretch is produced by elastin.
The vocal cords are inside the larynx