Answer:
The Z lines and H- zone shortens during the muscle contraction.
Explanation:
Sarcomere is the area between the two Z lines. The Z- lines are present in the centre of I - band and H - zone is present in the A - band. The actin filaments which are thin filaments present in I- band and contracts, slide over the myosin filament during contraction.
The I - band, H- zones are became shortens as they are thin than the A- band. It is anisotropic band having thick myosin filaments. They are not flexible and remain in its constant shape during the muscle contraction.
After the muscle contraction, the A- band and the H- zone comes to their original shape. In other words, the sarcomere shortens and comes back during muscle contraction, and relaxation.
Answer:
The correct answer is option D. cube.
Explanation:
The image represent the cells similar to the epithelial cells whcih is found in various tissues such as muscle, nervous and many more. These cells are found in cuboidal, columnar and squamous sha[es which found in normally double layer or in multiple layers.
These cells are cube like in structure with a spherical nucleus present in the center of the cell known in assocation of various cells.
<span>The cytoplasm of the cell.</span>
Answer:
The correct answer would be the option B.
The carrying capacity of an ecosystem refer to the maximum number of plants, animals, insects, and crops an ecosystem can support without getting any degradation.
Carrying capacity of different species may vary within an ecosystem.
It is determined by different factors such as food availability, shelter, water supply, et cetera.
