Answer the following questions true (T) or false (F)
1. The mesoderm refers to the middle layer produced during gastrulation.
2. The blastula contains an internal structure called the archenteron.
3. The mouth is the last thing produced by growth of the archenteron through the sea urchin gastrula.
1. TRUE
2. FALSE
3. TRUE
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The oxidation of ________ occurs both biotically and abiotically; however, at ________ pH values biotic oxidation is more common
A) Si / low B) ammonia / high C) Fe2+ / low D) Hgo / low
Staphylococcus aureus produces ________, an enzyme that results in the accumulation of fibrin around the bacterial cells
A) coagulase B) collagenase C) lipase D) M protein
Which of the following is a function of pasteurization?
A. Reducing the total microbial population B. Increasing the shelf life of the product C. Killing pathogenic microorganisms D. All of the choices are correct.
Which of the following are photosynthetic bacteria?
A. The cyanobacteria B. The green bacteria C. The purple bacteria D. All of the choices are correct.