Which of the following is an advantage of an in vivo experiment? A. Some enzymes behave naturally in a test tube
B. Variables and environmental conditions are controlled
C. Confusion is caused by the presence of many substances
D. Cellular components interfere with observations

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

What's the waste product of electrons and pyruvate combining in fermentation?  

What are the student's observations and inferences before he starts his investigation?