A G1 somatic cell nucleus in a female diploid Myrmecia pilosula (bulldog ant) contains 2 picograms of DNA. How much DNA would be expected in a metaphase I cell of a female?
A) 16 picograms
B) 4 picograms
C) 8 picograms
D) 32 picograms
E) Not enough information is provided to answer the question.
Answer: B
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Indicate whether the statement is true or false
In 1987, countries worldwide agreed to phase the production of ____________, once a major ozone destroyer, to reduce ozone layer thinning.
Fill in the blank(s) with the appropriate word(s).
Adhesins
A) allow pathogens to stick to host tissues only in a nonspecific manner. B) are limited to only a few known types. C) include molecules that are typically found deep inside the pathogenic cell. D) include molecules that bind to host factors such as fibronectin, sialic acid, and heparin / heparin sulfate. E) make poor targets for vaccine development.
Which level in the hierarchy shown is a community?
A) level A
B) level B
C) level C
D) level D