Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. ... It results in gametes that have unique combinations of chromosomes. In sexual reproduction, two gametes unite to produce an offspring.
Explanation:
The inner ear structures containing granules and helps with gravitational equilibrium are: the semicircular canals called utricle and saccule.
Ear is the organ involved in the hearing of sounds and also maintains the balance of the body. The ear is distinguished into three parts: the outer ear, the middle ear and the inner ear. The outer ear is called pinna. The middle ear consists of three most important bones called the malleus, incus and stapes.
Semicircular canals are the parts involved in balancing. These are the tiny tube like structures that contains a fluid. Apart from balancing, the semicircular canals are also able to detect the head position.
To know more about semicircular canals, here
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Scorpion does not belong to the group. Scorpions are part of
the class, arachnid. The Crayfish, the crabs and lobsters are part of the class
crustaceans. Crustaceans have five legs are normally found in the water.
Scorpions are terrestrial and are often found on land
The skeletal muscle is one of the three types of muscle in the organism. <em>Option a) is correct. From smallest to largest, the parts of a </em><em>skeletal muscle </em><em>are Myofilament, sarcomere, myofibril, muscle fiber, fascicle, muscle. </em>
<h3>
The skeletal muscle</h3>
- It is the most abundant muscle in vertebrates, constituting the somatic musculature.
- Among its many functions, it proportionates motion to extremities and digits and is responsible for the position and posture of the individual. It also participates in<em> eye movements, respiration, mastication, deglutition, and phonation</em>.
- The skeletal muscle contracts voluntarily, and its response is fast.
- Cells composing the striated muscle are significantly longer and multinucleated. They arrange in bundles, where cells are parallel to each other.
<h3>Composition of skeletal muscle</h3>
- <em>Myofilaments </em>⇒ Actine and miosine
- <em>Sarcomere</em> ⇒ It is the functional unit with the contractile apparatus. Composed of the Z band, A and I bands, and H zone.
- <em>Myofibrilles</em> ⇒ They have the Functional units
- <em>Muscle fibers</em> ⇒ Surrounded by endomysium
- <em>Fascicle </em>⇒ Group of fibers surrounded by perimysium.
- <em>Muscle</em> ⇒ Group of fascicles surrounded by epimysium.
Hence, the correct option is a).<em> From smallest to largest, the parts of a </em><em>skeletal muscle </em><em>are Myofilament, sarcomere, myofibril, muscle fiber, fascicle, muscle.</em>
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<em> You can learn more about the</em><em> skeletal muscle</em><em> at</em>
<em>brainly.com/question/1560716</em>
<em>brainly.com/question/1194286</em>
