Which list correctly orders soil particles in increasing diameter?
a. clay, sand, silt
b. clay, silt, sand
c. silt, sand, clay
d. silt, clay, sand
e. sand, silt, clay
b
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Cytotoxic T lymphocytes are distinguished from other lymphocytes by the presence of ________.
A. CD4 B. CD8 C. CD19 D. All of the choices are correct.
The Archaea and Bacteria are similar in that all
A. live in extreme environments. B. carry on photosynthesis. C. lack a nucleus. D. carry on aerobic respiration.
Due to their indispensible role for copying its genome, an intracellular host protease that attacks the adenoviral protein ends would likely result in halting its replication
Indicate whether the statement is true or false.
Since there is a larger concentration of potassium ions inside a neuron, why is the inside of the neuron negative (-70mV) relative to the outside?
A. The negative sign is just a historical convention. B. Potassium ions carry a negative charge. C. The high concentration of sodium ions outside the cell makes the inside negative by comparison. D. Negatively charged proteins inside the cell counteract the charge of the potassium ions.