<span>the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.</span>
Leg curls are focused on the muscles of the lower leg or hamstrings. Hamstrings are the largest calf muscles which should be exercised and trained frequently. Leg curls can be performed by a lying position. Leg curls should be done properly because, sometimes leg curls can cause back pains and lower back pain.
Vaccinations are mainly used to prevent the spread of
a. viral diseases.
a. viral diseases.(<span>measles or <span>hepatitis B...)</span></span>
Answer:
Mutations
Explanation:
A gene mutation is a permanent change in the DNA sequence of a gene. Mutations can occur in a single base pair or in a large segment of a chromosome and even span multiple genes. Mutations can result from endogenous (occurring during DNA replication) or exogenous (environmental) factors.
