Biology, 03.02.2020 15:56 victoriapellam04
How is nitrogen returned to the atmosphere during the nitrogen cycle? a. it is returned to the atmosphere in a process called nitrogen fixation. b. it is returned to the atmosphere through denitrification. c. it is returned to the atmosphere through cellular respiration. d. it is returned to the atmosphere through evapotranspiration.
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Biology, 20.06.2019 18:04
Describe the iron sulfide hypothesis and the lipid membrane hypothesis.
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Biology, 22.06.2019 12:30
Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.
Answers: 1
Biology, 22.06.2019 18:00
Prokaryotic and eukaryotic cells are different in many ways other than the presence or absence of a nucleus. if both archaebacteria and eubacteria are prokaryotic cells, then why are archaebacteria more closely related to eukaryotic cells than they are to eubacteria?
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Biology, 23.06.2019 02:50
Monkeys and humans share many of the same dna sequences and have similar proteins, indicating that a) the two groups belong to the same specie b) the two groups share a relatively recent common ancestor c) the two groups first appeared on earth at about the same time d) monkeys evolved from humans
Answers: 1
How is nitrogen returned to the atmosphere during the nitrogen cycle? a. it is returned to the atmo...
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