Preventing _____ions from leaking into the cell will block the action potential
a. potassium
b. sodium
c. calcium
d. chloride
e. ammonium
B; The action potential begins with the entry of sodium into the cell. If you can block the sodium gates from opening, you will block the action potential.
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The oxygen consuming property of a wastewater sample is designated by the term
A. lagooning. B. stabilization. C. activation. D. biochemical oxygen demand.
Which part of this seed, A, B, C or D, will give rise to the root system when the seed germinates?
1.A
2.B
3.C
4.D
In eukaryotic cells, which occurs during mitosis?
a. the duplication of chromatids b. the replication of DNA c. the pairing of homologous chromosomes d. the fragmentation and disappearance of the nuclear envelope and nucleolus e. a cleavage furrow is formed
________ are heritable changes in a gene or chromosome
Fill in the blank(s) with correct word