A person with only one allele for a recessive condition who does not have the condition is called a ________
Fill in the blank(s) with correct word
carrier
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Which of the following statements regarding the phosphorus cycle is incorrect?
A. The phosphorus pool is in sedimentary rock. B. Phosphorus must be phosphatized to enter biological systems. C. Phosphorus is released naturally by mining. D. Phosphorus mineralization occurs by microbial action. E. Thiobacillus produces sulfuric acid that dissolves phosphate rock.
Describe why many systematists adopt the principle of parsimony
What will be an ideal response?
Over 90% of the worldwide deaths from malaria in 2011 occurred in:
a. Africa b. India c. Mexico d. Southeast Asia e. South America
How do diatoms affect global atmospheric CO2 levels?
a. As surface seawater warms, the photosynthetic output of diatoms increases, removing more CO2. b. CO2 absorbed by diatoms is "pumped" to the ocean floor when they die, lowering CO2 levels. c. Blooms of diatoms kill fish and other consumers, increasing decomposition and raising CO2 levels. d. Because their glass-like walls are made of silica and not carbon, diatoms do not affect CO2 levels. e. As the basis of all marine food webs, diatoms perform 50% of the world's photosynthesis and lower CO2.