Bacteria in the genus ________ are sulfate and sulfite reducers.
Fill in the blank(s) with the appropriate word(s).
Desulfotomaculum
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An ecosystem includes ________ along with ________
A) macroorganisms / microorganisms B) living organisms / their chemical and physical environments C) pathogenic organisms / non-pathogenic organisms D) single celled organisms / multi-cellular organisms
Which of these statements INCORRECTLY describes an example of pleiotropy?
A. A mutation in a Cl-transport protein causes infertility and excessive mucus in the lungs. B. A mutation in a gene for microtubule formation causes a defect in sperm motility and cilia movement in the respiratory tract. C. A mutation in a lipid metabolism gene leads to a buildup of lipids in cells, causing blindness and paralysis. D. A mutation in the phenylalanine hydroxylase gene can cause mental retardation and loss of motor skills. E. A mutation in one allele for phenylalanine hydroxylase results in lower levels of this enzyme in the blood, which causes high blood levels of phenylalanine.
What happens to lymph?
a. it is returned to veins near the heart b. it is stored in the spleen c. it is returned to venules near capillary beds d. it is returned to arterioles near capillary beds e. it is expelled from the body by the kidneys
Which of the following factors may be directly responsible for maintaining a sharp edge between prairies and forests in the midwestern United States?
A) summer drought B) low winter temperatures C) tornadoes D) fire