Why was it necessary to use only Klenow fragment, rather than intact E. coli Pol I, in DNA sequencing reactions?

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.

Cells control gene expression at which steps