The distance between 1 and 7 spans a sarcomere correspond the structure at B is covered by the perimysium.
<h3>What is the smallest contractile unit within skeletal muscle?</h3>
A sarcomere comprises the segment between two consecutive Z lines and is the contractile unit of the muscle fiber, as it is the smallest portion of the muscle fiber capable of contraction and distension.
In this case, the distance between points 1 and 7 has the smallest structure of a skeletal muscle and corresponds to figure B.
See more about sarcomere at brainly.com/question/14005497
#SPJ12
<u>Complete question:</u>
Eye color in certain cat species is determined by a gene with multiple alleles. Brown eyes (CW) are dominant to green eyes (CN) which are dominant to grey eyes (CY) which are dominant to blue eyes (CB).
A. <em>List all the possible genotypes of a brown-eyed cat.</em>
B. <em>List all the possible genotypes of a grey-eyed cat.</em><em> </em>
C. Show the chances of obtaining a green-eyed cat from the cross
<u>Answer and Explanation:</u>
You will find the complete answer and explanation in the attached file due to technical problems.
The largest vein in an animal's body is in fact the Vena Cava.
Hope I helped :)