SAT词汇：以I开头的生物专业词汇

2016-01-22 14:15:27来源：新东方在线论坛　

【考试动态】2019年SAT考试时间报名费用报考指南成绩查询送分流程成绩要求成绩换算
【资料推荐】SAT词汇巴朗3500系列SAT阅读OG1-8经典错题解析SAT数学满分冲刺重要知识点
【备考指导】CB发布2018年SAT考试官方报告SAT北美考点汇总美国大学TOP100SAT成绩要求

SAT考试阅读中的常考词汇有哪些？新东方在线为大家准备了SAT词汇：以I开头的生物专业词汇，希望能够帮助到正在准备SAT考试的考生。　

　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.

以上就是关于SAT词汇：以I开头的生物专业词汇，更多SAT考试真题、SAT数学、SAT词汇资料，敬请关注新东方在线SAT频道!

SAT水平能力测试【0元免费测试】