Potassium deficiency in plants occurs when plants grow on light, sandy soils and cannot obtain enough potassium ions. Such plants are deficient in (check all that apply)
A. a macronutrient.
B. an essential element.
C. a micronutrient.
D. a limiting factor.
Answer: D
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Heterocysts
A. are found in nitrogen-fixing cyanobacteria. B. are used to protect nitrogenase. C. produce catalase. D. generate oxygen. E. are found in nitrogen-fixing cyanobacteria AND are used to protect nitrogenase.
The striated muscles in most invertebrates have thick and thin filaments arranged in sarcomeres entirely similar to
those of vertebrates.
Indicate whether the statement is true or false.In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
spotted (s). In the F2 generation of a cross between BB ss with bb SS, what fraction of the offspring would be expected to be black and spotted? a. 1/16 b. 9/16 c. 1/9 d. 3/16 e. 3/4
During Krebs cycle reactions the ____________________ NAD and FAD pick up H+ and electrons for processing in
the electron transport system. Fill in the blank(s) with the appropriate word(s).