What pathogen can cause severe birth defects if it crosses the placenta during the first eight weeks of pregnancy?
a. herpes virus
b. HIV
c. rubella
d. alcohol
e. folate
c
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You label cells with a radioactive isotope of sulfur (35S). The only molecules that would be radioactively labeled in these cells are:
A. Proteins B. Carbohydrates C. Nucleic acids D. Lipids Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about the composition of different monomers? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Plate tectonics theory is supported by evidence from
a. the worldwide fossil record. b. global distribution of existing species. c. the sea-floor spreading. d. all of these. e. none of these
What is a virus?
A) an organism in domain Archaea B) an organism in kingdom Protista C) an organism in domain Bacteria D) a non-living particle
Which term is given to the measure of the proportion of offspring that a particular phenotype will contribute to the next generation?
What will be an ideal response?