Because of its negative charge, there is more _______ in a cell than in the extracellular fluid.
a. potassium (K – )
b. chlorine (Cl – )
c. sodium (Na + )
d. potassium (K +
d. potassium (K +
Because of its negative charge, there is more potassium (K + ) in a cell than in the extracellular fluid. A cell has a higher concentration of potassium (K + ) than the extracellular fluid because of its negative charge.
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Which of the following statements is TRUE about chromosomes?
a. Chromosomes are always spread out as chromatin. b. Chromosomes are always condensed. c. Homologous chromosomes have the same genes on them but can have different alleles. d. Homologous chromosomes have the same genes on them and always have the same alleles of those genes. e. Chromosomes always consist of two sister chromatids.
The cross section in the accompanying figure is representative of the internal structures found in:
a. phoronids. b. nemerteans. c. gastropods. d. flatworms. e. oligochaetes
In biology, a trait that arose in an ancestor and is passed along to its descendants is referred to as a...
a) molecular clock b) derived character c) taxonomic group d) physical similarity
A new type of strawberry plant produces fruit in the late spring, throughout the summer, and into the fall. It is a(n) ________ plant
A) day-neutral B) long-day C) short-day D) indeterminate-day E) night-determinate