In a basic staining procedure, which is the correct order?
A.
Fix, smear, stain
B.
Smear, fix, stain
C.
Fix, stain, decolorize
D.
Smear, decolorize, stain
B
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. Rubella is a member of which virus family?
A. Paramyxo virus B. Herpes C. Togavirus D. Papovavirus
The common ancestor of all cells lived ________ years ago
a. 4.3 billion b. 7.4 billion c. 2.3 million d. 200 million e. 13 billion
Animal cell centrosome MTOCs contain
A) condensins. B) cyclin-Cdk. C) centrioles. D) mitochondria. E) phragmoplasts.
At the beginning of a research project on egg laying in seagulls, a researcher noted that the birds laid an average of 7-9 eggs per clutch. After studying the population for 15 generations, the researcher noted that the birds were now laying 3-4 eggs per clutch. What type of natural selection is occurring in the population of gulls?
A. directional B. stabilizing C. disruptive D. There is no selection occurring in this population.