Answer: Skeletal Muscles
Explanation:
Skeletal muscle is one of the three muscles that is found in the body. Other two types are cardiac and smooth mucles.
It is formed by the striated tissues that are under the voluntary control of the somatic nervous system.
They are attached to the boned by the bundles of collagen fibers. The muscles consists of actin and myosin whose repeated units are known as sarcomere.
This sarcomere provides this muscle the striated appearance.
D. Ponds and lakes
Explanation:
Limnetic zone is the water area zone where light does not penetrate the bottom as the depth of the water is more towards the center whereas littoral zone is the zone near shore area which is shallow and where plants grow and sunlight penetrates all way in this area. Littoral zone surrounds the limnetic zone in the lake and ponds because the rest of the water bodies mentioned in the question have free flowing water.
The presence of a mutant lac repressor that could not bind lactose would result in no transcription even when lactose was present because the mutant repressor would remain bound to the lac operator
The transcription of lac operator is controlled by the lac repressor. When lactose is present, the lac repressor normally will bind to the lactose, removing itself from the lac operator so it could be transcripted.
In this case, the mutation makes the lac repressor keep binding to the lac operator so the result would be no transcription even when lactose present.
The periosteum doesn't cover the portion of bones that contains articular cartilage, which is the cartilage found in joints that keeps the bones from rubbing together. It is not as tightly packed and contains cells that help in bone growth and repair.
in b/w A and T there will be two Hydrkgen bknds where as in b/w G and C there will be three hydrogen bonds