Answer:
Sarcomere
Explanation:
The muscle fiber / myofibrils consist of 2 types of filaments - actin and myosin. The myosin filaments are thick filament whereas the actin filaments are the thin filament.
In addition to this, the muscles have A-band and I-bands. These bands give the muscles alternate light and dark colour band structure. In the A-band, myosin filaments are present, whereas in the I - band the actin filaments are found.
In I-band 2 Z-lines are located. The area between the Z-lines is called sarcomere. In this sarcomere region both actin and myosin filaments present.
When muscles get contracted the length of the sarcomere shorten. The actin and myosin filaments overlap in this area. A cross-bridge form between them, with the help of filamentous protein titin.
It is using rotation movement
but to pry something open with a screwdriver like a lid of a paint then it is used as a lever,hope this helped
Ans.
TEM or transmission electron microscopy is a microscopy method, which uses an electrons' beam to enlarge image of a specimen. It provides two-dimensional images of internal structures or organelles of cells.
As TEM is used to study internal structures of cells, only dead specimens can be used for study. TEM provides high magnification than conventional light microscope.
Thus, the correct answer is 'option C). internal structures of a cell.'
The answer is B. Abiotic features are usually the non living factors that influence the ecosystem