Which of the following pertains to an improperly canned food product on a store shelf that has a bad odor and putrefaction of the canned material?
A) mesophilic spoilage
B) flat sour spoilage
C) bacterial soft rot
D) thermophilic anaerobic spoilage
E) hydrogen sulfide spoilage
A
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Calcium ions can act as second messengers by binding to ____, which then regulates other proteins
a. cyclic AMP b. calmodulin c. protein kinase d. phosphodiesterase e. adenylyl cyclase
What happens to most of the nitrogen in a leaf every autumn?
A) It is resorbed by the tree. B) It is released as N2 gas. C) It is broken down in soil. D) It is consumed by decomposers.
When conducting a biological study or experiment in the field which equipment is the most important?
a) heat-resistant gloves b) thermometer c) field guide about wildflowers d) first-aid kit
Which of these is a type of prokaryotic cell?
A. a mushroom cell B. a plant cell C. a worm cell D. a bacterial cell