Which of the following hypotheses relies on the chemical reaction between hydrogen sulfide (HS2) and iron (Fe) for the built up of a H2 concentration gradient to provide the necessary energy for the reduction of N2 to NH3?
A. Reducing Atmosphere Hypothesis.
B. Extraterrestrial Hypothesis.
C. Deep-Sea Vent Hypothesis.
D. Both Reducing Atmosphere and Extraterrestrial Hypotheses.
E. All three hypotheses use this exact reaction to create a chemical gradient to form amino acids.
C. Deep-Sea Vent Hypothesis.
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Determine the order of the processes occurring as a protein travels through the endomembrane system.
A. Pinching of vesicle into the cytoplasm. B. Movement through the cis, medial and trans regions. C. Transportation to the Golgi. D. Attachment of protein to cargo receptors. E. Release of the protein out of the cell. F. Translation of protein into the Rough ER.
The efferent arterioles transport blood directly into the:a
afferent arterioles. b. Bowman's capsule. c. glomerulus. d. peritubular capillaries. e. renal artery.
The majority of microbes live and grow in habitats between pH 7 and 9.
Answer the following statement true (T) or false (F)
Many plants devote significant resources to growing colorful, fragrant flowers filled with nectar. What does this illustrate the importance of?
A. Outcrossing B. Nutrient storage in seeds C. Long-term nutrient storage in perennial plants D. Chemical signaling among plants