What percentage of water is reabsorbed by the proximal convoluted tubule by the time the filtrate leaves?
A. 75%
B. 0%
C. 10%
D. 25%
E. 50%
A
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Sometimes cultural change can drive biological evolution
A. true B. false
Recombination frequency for two genes is a function of the ____
a. distance between the two genes on a single chromosome b. overall size of the chromosome on which the genes are located c. distance between the two chromosomes on which the two genes are located d. relative sizes of the two chromosomes on which the two genes are located e. sex of the parent that supplies each gene
What is not an adaptation to avoid overheating and desiccation? a. A barnacle trapping water inside with calcareous plates
b. A mussel closing its shell at high tide. c. A crab simply moving towards water. d. An anemone covering itself with shell fragments.
A toxin that inhibits the production of GTP would interfere with the function of a signal transduction pathway that is initiated by the binding of a signal molecule to _____ receptors.
-G-protein-linked -ion-channel -intracellular -steroid -receptor tyrosine kinase