Muscle cramps are helped by massage and stretching, which increase blood flow to the affected area.
a. true
b. false
Answer: a. true
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DNA vaccines are dangerous due to the possibility of the DNA causing reversion in the inactivated pathogen
Indicate whether this statement is true or false.
The plant hormones known as ___________ may have an evolutionary origin in the common ancestor to both plants and animals.
A. brassinosteroids B. oligosaccharides C. cytokinins D. auxins E. abscisic acids
Late in puberty, the sex hormones signal the growth plate of a bone to stop growing; once this happens, the bone cannot get longer, but it can grow in width
Indicate whether the statement is true or false
You are trying to determine the linkage map of a series of genes, X, Y, and Z, from Caenorhabditis elegans, a nematode worm commonly used in scientific research. From doing several crossover experiments, you know that the recombination frequency between
X and Y is 11.5%, between Y and Z is 13%, and between X and Z is 25%. What is a possible sequence of these genes? A) X-Z-Y B) Y-Z-X C) Z-X-Y D) X-Y-Z