Here, given-
homozygous alleles 'a' have a frequency of 0.3.
Also the alleles are in equilibrium in a Hardy-Weinberg population. The frequency of individuals that are homozygous for this allele are= 0.49.
The Hardy-Weinberg equilibrium can be defined as the principle which states that the variation in the genetic makeup of a population remains constant and unchanged till there are no external interferences, influencing the population.
Calculation-

Then to find the frequency of the individuals homozygous for this allele the following formula needs to be used-


Thus, the individuals homozygous for the allele can be calculated by 
Learn more about the Hardy-Weinberg equilibrium here-
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Clostridium perfringens is usually the cause of foodborne illness it is associated
with meat and meat dishes, gravies, and improperly handled leftovers. Common
symptoms of foodborne illness are fever, diarrhea, vomiting. The incidence of
foodborne illness is rising because of all the following factors increased
shelf life of food products.
Answer:
A Origin
Explanation:
Sternocleidomastoid is the muscle found in the cervical and it’s the largest. It is responsible for the rotation and flexibility of the neck and is a very powerful and tissue-rich muscle.
The sternocleidomastoid muscle extends from the mastoid process of the temporal bone to the sternum and medial clavicle. When both sternocleidomastoid muscles contract, the head is flexed. The end of the muscle called ORIGIN connects to the sternum.
It is a spreadable disease and highly contagious, and communicate very rapidly, so when it first appeared, it was a very difficult task to prevent ourselves from that Hazardous condition. The Scientific name of this bacteria is "MyoBacterium Tuberculae", As it is directly spreads through air means, air is the vector as there's not any insect or external agent for that Job. Could be life threating if proper treatment is unavailable for a Patient. It exerts dangerous symptoms like: "Chills, fatigue, fever, loss of appetite, malaise, night sweats, or sweating". It can be diagnosed through the process of "<span>The Mantoux </span>tuberculin skin test (TST) or the TB blood test" It is performed by injecting a small amount of fluid called tuberculin into the skin in the lower part of the arm. Doctors may prescribe certain Antibiotics to the patient if he's been diagnosed like Isoniazid, Rifampicin, Pyrazinamide, Ethambutol and <span>Streptomycin. By proper care, we can get our control over the disease.
Hope this helps!</span>