The signaling molecule involved in juxtacrine cell signaling is:
A. a small soluble peptide.
B. a neurotransmitter.
C. a transmembrane protein.
D. a growth factor.
C
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The first portion of the small intestines is the ____
a. cecum b. jejunum c. ileum d. duodenum e. appendix
Giovanni is resting peacefully after a long day of hard work. Assuming he is otherwise healthy, what would be the volume of his ventilations?
A) 500 ml B) 1900 to 3300 ml C) 4500 to 6000 ml D) 1100 to 1200 ml
The differential distribution of wing length in Drosophila, with larger wings in northern areas and smaller wings in
southern climates, provides evidence that:a. wing length is not a heritable trait. b. the fossil record is usually inaccurate. c. the molecular clock cannot be applied to fruit fly traits. d. chance is the most important agent in evolutionary change. e. natural selection is the most important agent in evolutionary change
In the establishment of rhizobia in a legume, infection threads are found in the:a
stele. b. cortex. c. root hairs. d. xylem. e. phloem.