In scanning electron microscopy, an electron beam passes through a very thin slice of a specimen and then falls onto a
photographic plate or a fluorescent screen. Indicate whether the statement is true or false.
False - transmission
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Which of the following terms is incorrectly matched with the word from which it was derived?
A) Z line-zwischen B) M line-myomesin C) H zone-hell D) I band-irregular E) A band-anisotropic
In cultivated stocks, the cross of a variety of white
flower plants produced all red flowers in the F1 generation, but the F2 generation produced 87 red, 31 cream, and 39 white. Explain these results by giving the genotypes possible for each phenotype. What will be an ideal response?
A DNA chip that contains rows of DNA sequences for mutations that indicate the presence of particular genetic disorders is representative of what type of biotechnology?
A. gel electrophoresis B. PCR C. gene pharming D. DNA microarrays E. DNA fingerprinting
According to the theory of common descent, how should each species on Earth today compare?
A) They should look very similar to all other species. B) They should not have ancestors in common with members of other species. C) They should have a single ancestor in common. D) They should have DNA that is mostly unique from other species.