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。

　　Imprinting(印记)

　　Instinctual behavior in which social bonds are formed during early development. Typically used with the example of a newly hatched bird or other animal identifying and treating the first moving object it sees as its mother.

　　incomplete dominance(不完全显性)

　　Occurs when two different alleles of the same gene are both partially expressed in a heterozygote. The resulting phenotype is intermediate between the homozygous phenotypes of the two alleles. Color in a four o’clock flower is an example of incomplete dominance.

　　independent assortment(单独分类)

　　Mendel’s conclusion that during gamete formation, the segregation of one pair of genes has no influence over the segregation of another pair of hereditary units. Two different traits will thus be inherited independently of each other. This law holds true, except for linked genes. It is often called Mendel’s second law.

　　inheritance of acquired traits(获得性状遗传)

　　A crucial, and incorrect, aspect of Lamarck’s theory of evolution. Lamarck believed that the traits a parent acquired during its lifetime would be passed on to its offspring.

　　Instincts(本能)

　　Behavior that is hardwired into the brain of an organism; behavior that does not have to be learned.

　　Insulin(胰岛素)

　　Hormone secreted by the pancreas that reduces blood sugar levels. A lack of insulin can result in diabetes.

　　Interphase(间期)

　　The phase of the eukaryotic cell cycle in which the cell prepares for division, primarily by replicating its DNA. After interphase, the cell enters mitosis.

　　intertidal zone(潮间带)：涨潮线与落潮线中间之地区

　　The most shallow zone in a marine habitat. Periodically dry or wet with the changing tides. Algae, sponges, mollusks, starfish, and crabs inhabit this zone. Also called the littoral zone.

　　Ion(离子)

　　An atom or molecule that has lost or gained an electron and consequently has a positive or negative charge.

　　Isotonic(同渗压的)

　　A situation in which the concentration of solutes in a solution is equivalent to what it contains. There is no concentration gradient in isotonic solutions and no net flow of solutes or water.