The Keeling curve depicted here has an annual cycle. What is the primary cause of this cycle?
What will be an ideal response?
Fluctuations in amount of carbon being fixed by plants across seasons
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According to the logistic growth equation, = rmaxN,
A) the number of individuals added per unit time is greatest when N is close to zero. B) the per capita growth rate (r) increases as N approaches K. C) population growth is zero when N equals K. D) the population grows exponentially when K is small. E) the birth rate (b) approaches zero as N approaches K.
As electrons move along the electron transport chain, they lose potential energy. How is the energy that is released used by the cell?
A. The energy is used to transport protons against their concentration gradient B. The energy is used to pump electrons along the electron transport chain C. The energy is converted directly into ATP D. The energy is used to pump NAD+ into the cytoplasm so it can be used in glycolysis
Transposons are frequently used as cloning vectors.
Answer the following statement true (T) or false (F)
The genetic makeup of an individual is the
A) sex cell. B) gene pool. C) phenotype. D) mutation. E) genotype.