NPP is the difference between plant photosynthesis and respiration. Therefore, NPP quantifies the net absorption of what element(s) by living plants?
A. Phosphorus
B. Carbon
C. Nitrogen
D. Oxygen
E. Nitrogen, phosphorus, and potassium
Answer: B
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Imagine that you are studying the control of ?-globin gene expression in immature red blood cells . (Mature red blood cells contain ?-globin protein but lack a nucleus and, therefore, the ?-globin gene.)
If you deleted a sequence of DNA outside the protein-coding region of the ?-globin gene and found that this increased the rate of transcription, the deleted sequence likely functions as _____. A) a promoter B) a promoter-proximal element C) an enhancer D) a silencer E) any of the listed functions
A new flower species has a unique photosynthetic pigment. The leaves of this plant appear to be blue-green. What wavelengths of visible light does this pigment reflect?
A. green, red, and violet B. green and blue C. red, yellow, and green D. blue and violet E. red and yellow
The products of the endoplasmic reticulum are transported to the Golgi apparatus by
A) cilia. B) vesicles. C) endocytosis D) gated channels. E) free-floating ribosomes.
Ecosystems in the United States experience seasonality because:
A) there is a predictable seasonal solar activity cycle. B) the rotation of Earth causes a rhythmic circulation of Earth's atmosphere. C) Earth is closer to the sun in summer and farther away in winter. D) Earth is tilted with respect to the orbit around the sun. E) Earth rotates on it's axis relative to the sun.