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Environment and Body Plans of Organisms People have long been curious about living things—how many different species there are what they are like, where they live, how they relate to each other, and how they behave. Scientists seek to answe...
Bruce D. McKee1, February 8, 2010. The Rockefeller University Press, doi: 10.1083/jcb.200904040 Review by: Rihui Yan1 Introduction The stepwise decrease of cohesions, the complexes that contain sister chromatics simultaneously, is needed f...
DNA) was first discovered in 1869 by Johann Friedrich Miescher, but it was not until the 1950s while studying viral replication did Alfred Hershey and Martha Chase determine DNA was Genetic material. In 1953 James Watson and Francis Crick d...
reproduction: a reproductive system in which two differentiated cells (called gametes) fuse to give rise to a new individual single cell (the zygote) that will be developed by successive mitosis as multicellula. This definition of sexual re...
genetically engineered vaccine, which was used for Hepatitis B. The organisms are genetically unique as genetically modified organisms can be engineered that will help in the study of human diseases. An example of this is the use of “knocko...
caused by the presence of an extra chromosome (or part thereof) on chromosome pair 21, so that the cells of the people have three chromosomes in the pair, however, there are only two in normal condition. This inborn error occurs spontaneou...
mitosis usually occurs in the distribution of the cytoplasm and finally divided the whole cell (Bennett, 2009, pp. 277-299). The result of the process of mitosis with the distribution of the cytoplasm is two daughter cells (also called “des...