In which growth phase do bacteria grow exponentially?
A) lag phase
B) log phase
C) acculturation phase
D) stationary phase
E) habituation phase
Answer: B
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A new antibiotic has been developed that inhibits the activity of an enzyme by competitive inhibition. What effect will this have on the activation energy of the enzyme-catalyzed reaction?
A. The activation energy required for the reaction in the presence of the antibiotic would be greater than the activation energy required in the absence of the antibiotic B. The activation energy required for the reaction in the presence of the antibiotic would be less than the activation energy required in the absence of the antibiotic C. The activation energy required for the reaction in the presence of the antibiotic will be the same as the activation energy required in the absence of the antibiotic Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about enzymes and activation energy? What factors influence activation energy? What other information is related to the question? Choose Answer Do you have all necessary information to analyze how the antibiotic might influence activation energy? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In what group of animals are monogamy and cooperative care of the young by two parents most common?
What will be an ideal response?
Which of the following is NOT an adaptation needed for living on land?
a. egg shell b. internal fertilization c. skeletal system and muscles d. external respiratory surfaces e. embryo development within the female
The chief concern among conservation biologists trying to protect small populations is:
a) to maximize rates of allele fixation. b) that mutation rates are much higher in small populations. c) to preserve genetic diversity. d) that natural selection can only operate in large populations. e) to reduce the duration of genetic bottlenecks.