Amniocentesis or amniotic fluid test or AFT refers to the prenatal diagnosis of chromosomal abnormalities and fetal infections. It is performed after 16 weeks of pregnancy. The fetal DNA from a small amount of cells from the amniotic fluid of the amniotic sac is sampled for genetic abnormalities by inserting a needle and extracting it. The fluid contains cells that are sloughed off by the fetus. They are separated from the amniotic fluid, grown in a culture and then microscopically examined for genetic and chromosomal abnormalities. The test is a reliable indicator of chromosomal abnormalities such as Down’s syndrome, spina bifida, muscular dystrophy, rh diseasetrisomy 13, trisomy 18, fragile X, Tay-Sachs disease, Hunter's syndrome and other metabolic disorders.
Plant cells are eukaryotic cells that have a definite nucleus with specialized structures known as organelles that perform different functions within the cell. Some organelles of the plant cells with their function include; nucleus (controls the cells activities and contains genetic materials), cell wall (support the cell and also maintains high turgidity), ribosomes (synthesizes protein), mitochondria (produces ATP (energy) out of food), Golgi Apparatus (process and package proteins), chloroplasts (produces food by photosynthesis using sunlight), vacuole (stores water or food molecules) and lysosome (contains digestive enzymes that break down food).
Often, we can cause the exchange of electrons, which creates charge.
For example, rubbing a rubber comb with a wool cloth will create charge on the comb, and it will attract small bits of paper.
Answer:
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Explanation:
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