What will a mutant soybean plant that is unable to produce leghemoglobin most likely suffer from?
a. deficiency in magnesium
b. deficiency in potassium
c. deficiency in oxygen
d. deficiency in nitrogen
Ans: d. deficiency in nitrogen
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How are the sulfur cycle and the phosphate cycle interconnected?
A. Phosphate is released from rock and soil by sulfuric acid. B. Sulfate and phosphate react together to produce amino acids for protein production. C. Sulfite is the nutrient used by phosphate reducers. D. Phosphate is the nutrient source used by sulfur oxidizers.
During a particular period of physiological crisis, imagine that your carbon dioxide levels increase sharply, and consequently your blood pH decreases. Predict what will happen to the affinity of your hemoglobin for oxygen in this situation.
A. The affinity for oxygen by hemoglobin is constant- it does not change. B. The affinity for oxygen by hemoglobin will increase. C. The affinity for oxygen by hemoglobin will decrease.
How do cells in the body of a multicellular organism communicate with each other?
a. by way of signaling molecules that interact with specific receptors b. through long projections that directly connect cells to each other c. through electrical signals passed within a cell d. by the transport of ions between cells in different parts of the organism e. by the transport of ions in water
What does the presence of a tail in early human embryos and other chordates suggest about all chordates?
A) Chordates may eventually develop a tail when fully mature. B) Chordate embryos have greater mutation rates than other organisms. C) Chordates develop in a very different manner compared to other life forms. D) Chordates were derived from a common ancestor with this developmental pathway.