Which geological timescale contains the greatest number of years?
A. Periods
B. Epochs
C. centuries
D. eras
E. Decades
Ans: D. eras
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You are assembling a model of a chromosome, but begin having some trouble when you get to the step of forming chromatin loops. If you are unable to resolve this problem, what step of chromosome structure would you be unable to achieve?
A. Nucleosome B. Solenoid C. Histone/DNA complex D. Rosettes
Why might a seed be covered in prickly hooks?
A) To aid in seed dispersal B) To allow it to float on water C) To keep it from being eaten D) To help the seed germinate E) To attract insects
Parkinson's disease is associated with a deficiency in
A) dopamine. B) serotonin. C) acetylcholine. D) endorphins.
The diversification of insects is related to the diversification of food sources in the environment.
Answer the following statement true (T) or false (F)