What will be the weight in grams of a double-helical DNA molecule stretching from the Earth to the moon (320,000 km). The DNA double helix weighs about 1x10^-18 g/1,000 nucleotide pairs.

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#Question id: 2669

#Unit 2. Cellular Organization

what is an operon?

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#Question id: 11385

#Unit 10. Ecological Principles

Which of the following biomes is correctly paired with the description of its climate?

A) savanna-low temperature, precipitation uniform during the year

B) tundra-long summers, mild winters

C) Taiga-relatively short growing season, Low precipitation

D) temperate grasslands-relatively warm winters, most rainfall in summer

E) tropical forests-nearly constant day length and temperature

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#Question id: 28536

#Unit 5. Developmental Biology

which of the following gene that positively regulate WUS (meristem-promoting gene)?

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#Question id: 26806

#Unit 8. Inheritance Biology

Which of the following cell cycle stage is choosen for seeing chromosomal mutation?Which of the following cell cycle stage is choosen for seeing chromosomal mutation?

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#Question id: 6996

#Unit 5. Developmental Biology

During metamorphosis, a tadpole's tail is reduced in size by the process of ________.