Which of the following brain structures is active during REM sleep?
-the thalamus
-the brain stem
-the amygdala
-all of the above
all of the above
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Where are ectomycorrhizae MOST commonly found?
A) boreal and temperate forests B) forests with especially low nutrients C) tropical forests D) boreal and temperate forests, forests with especially low nutrients, and tropical forests
Craving alcohol and an inability to limit the amount of alcohol one consumes are symptoms of fetal alcohol syndrome.
Indicate whether the statement is true or false
Erwin Chargaff discovered that DNA contains equal numbers of adenine and thymine bases and equal numbers of cytosine and guanine bases. Which hypothesis would this have most likely led to?
A.) DNA might be in the form of a helix. B.) There might be some kind of symmetry in the DNA molecule. C.) DNA is not the only molecule involved in the passing on of hereditary traits. D.) Guanine and cytosine have very different structures than adenine and thymine.
What are the differences between complete dominance and codominance?
What will be an ideal response?