Karyotypes were first performed using blood samples taken from youngsters and adults. Later, a pre- birth process called amniocentesis was developed which allowed medical researchers to obtain samples of cells from extraembryonic fluid located in the amniotic sac, which surrounds an unborn child.
Answer:
Some body systems work together to complete a job. For example, the respiratory and circulatory systems work together to provide the body with oxygen and to rid the body of carbon dioxide. The lungs provide a place where oxygen can reach the blood and carbon dioxide can be removed from it. Some body systems share a common organ that performs more than one job.
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In an animal cell, Mitochondria alone provides energy required to carry out all life essential cellular activities like synthesis of substance, disposal, Synthesis of protein,etc, by converting food into energy rich molecules called ATP.
Whereas in case of a plant cell, Chloroplast along with Mitochondria generates energy for the cell. Chloroplast in the plant cell uses sunlight to synthesis energy through the process of light and dark reaction simultaneously.
Answer:
A. Acute rheumatic fever.
Explanation:
Acute rheumatic fever is an autoimmune response to the infection of bacteria called group A streptococcus. This infection commonly occurs in children and particularly after 2 to 3 weeks of pharyngitis or sore throat. It has manifestations of cardiac (murmur), rheumatologic, and neurologic.
So, the above symptoms shown in question is purely related to acute rheumatic fever.
