在SAT考试中，掌握词汇量的多少对于英语考试的听力、写作、阅读等每个环节都有很重要的影响，因此背诵词汇是英语能力提升以及通过各种考试必不可少的重要部分。文都网校与大家分享下面的词汇，希望能够帮助到大家。

　　Karyotype(染色体组型)：个体或细胞具有的独特的染色体形态或数目

　　A photograph of the chromosomes from an individual cell, usually lined up in homologous pairs, according to size. Missing, extra, or abnormal chromosomes can then be easily identified, aiding in the diagnosis of genetic disorders.

　　Kidney(肾)

　　The organ of blood filtration in humans. The functional unit of the kidney is the nephron.

　　Kingdom(界)

　　The broadest category of biological taxonomy.

　　Krebs cycle(三羧酸循环)

　　A metabolic pathway in aerobic organisms in which acetyl-CoA combines with oxaloacetic acid to form citric acid. For this reason, the Krebs cycle is also known as the citric acid cycle. The cycle produces energy in the forms of ATP, NADH, and FADH2.