What does the term vector mean in the ?eld of biotechnology?
What will be an ideal response?
Vectors are the gene-carrying vehicles that can enter, replicate, and express themselves within bacteria and other types of cells. Scientists use manipulated vectors such as plasmids to introduce foreign genes into bacteria.
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A collection of organisms, together with the physical and chemical factors in their environment, are called a(n) ________.
A. ecosystem B. atmosphere C. lithosphere D. biosphere E. hydrosphere
One of the lines of evidence supporting the theory that modern humans originated in Africa is that the modern-day human population of Africa contains the greatest diversity of genetic variants of any human population
Why is this consistent with the idea that humans first evolved in Africa?
Which statement about vestigial traits is correct?
A. Vestigial traits are similar to functional traits in closely related species. B. Vestigial traits improve the biological fitness of individuals. C. Vestigial traits cannot be explained by the theory of evolution by natural selection. D. Humans lack vestigial traits.
Which is the temporary blood vessel that shunts most blood past the fetal liver?
A) ductus arteriosus B) aorta C) foramen ovale D) ductus venosus