What do synaptic signaling and paracrine signaling have in common?
A. Cells release a signal that affects cells at long distances.
B. Cells release a signal through gap junctions to affect neighboring cells.
C. Cells release a signal that affects neighboring cells.
D. Cells bind a membrane bound signal on a neighboring cell.
E. Cells release a signal that affects it and neighboring cells.
Answer: C
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One of your friends has several brothers and sisters, each quite different in appearance, interests, and abilities, even though all have the same parents. Explain in detail how these siblings reflect crossing over and independent assortment.
What will be an ideal response?
A population that is in genetic equilibrium is said to ____
a. have an equal number of homozygotes as heterozygotes for a given trait b. deviate from the Hardy-Weinberg law c. require genetic testing for estimation of allele frequencies d. lose genetic variation with each generation e. have an allele or alleles that remain constant generation to generation
Which of the following techniques is designed for separating and analyzing proteins according to their size?
A) Agarose gel electrophoresis B) Affinity chromatography C) Polyacrylamide gel electrophoresis D) Microarray analysis E) Sanger sequencing
Human facial expressions in response to various emotions
A) vary according to race. B) vary according to age. C) vary according to sex. D) are remarkably similar among different cultures. E) vary tremendously from culture to culture.