The name of the structure labeled as A is 'myosin'. Moreover, the name of the structure labeled as B is 'actin'.
A sarcomere is the basic unit of muscle contraction. This unit is defined as the region between two Z-lines.
Band A is a central band composed of the thick filaments of myosin.
Moreover, the sarcomere also has two halves of a band known as I-band, which consists of thin filaments of actin.
Muscle contraction is caused by the interaction between actin and myosin protein filaments in the sarcomeres.
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In prophase 1:
Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears.
In metaphase 1:
The pairs of chromosomes (bivalents) become arranged on the metaphase plate and are attached to the now fully formed meiotic spindle. The centrioles are at opposite poles of the cell.
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<h2>Least desirable method for processing the crime scene</h2>
You are at a crime scene, collecting glass evidence. Following are the least desirable methods for processing the crime scene for glass fragments as: At a crime scene, a person should be very concerned at the gathering and organization of mirror pieces.
- Proper accumulation and protection methods should be utilized for getting a specimen from glass pieces.
- Put on latex gloves.
- Use clean forceps.
The data should be typed accurately.
