If a DNA fragment is 21,000 bp long, about how many DNA fragments would result after incubation with EcoRI?
A. 3
B. 5
C. 10
D. 20
E. 100
B
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Match the plant process or characteristic with the location in which it occurs in the cell.
A) thylakoid lumen B) ribosomes C) nucleolus D) cytoplasm E) thylakoid membrane F) stroma G) matrix 1) sucrose synthesis 2) starch synthesis 3) electron transport 4) concentration of protons
The only known human pathogen that preferentially attacks the peripheral nerves is
A. N. meningitidis. B. polio virus. C. E. coli. D. M. leprae.
Respiration is a physiological process by which O2
enters the internal environment and CO2 leaves by diffusing across a __________. Fill in the blank(s) with the appropriate word(s).
Under the conditions known as El Niño, the inorganic nutrient content of the seawater off the coast of Peru declines to very low levels. What effect will this likely have on marine life in the area?
A) The lower the levels of minerals, the less polluted the water; hence, most populations will increase. B) It will result in toxic red tides, which will reduce the populations of many species. C) It will reduce the abundance of phytoplankton and, consequently, the abundance of other organisms. D) It will increase the productivity of phytoplankton and, therefore, the productivity of other organisms by allowing sunlight to penetrate deeper into the ocean.