Which of the following is an agent of the sexually transmitted disease chancroid?
A. Haemophilus aegyptius
B. Haemophilus influenzae
C. Haemophilus parainfluenzae
D. Haemophilus ducreyi
E. Haemophilus aphrophilus
Ans: D. Haemophilus ducreyi
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For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy of the products is -390 kJ. The entropy of the reactants is 0.2 kJ/K. The entropy of the products is 0.3 kJ/K. The temperature of the reaction is 25 degrees Celsius. What can you conclude about this reaction?
A. It is exergonic B. It is endergonic C. it is a redox reaction D. It is being catalyzed by an enzyme Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know aboutenergy of reactants and products in a reaction? What other information is related to the question? Choose Answer Do you have all the information needed to make a determination about the change in free 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?
Homeotic genes activate other genes that determine the ____________ of each segment
A. segment B. parasegment C. morphological characteristics D. zygotic
The chromosome that plays the largest role in human sex determination is
A. the group of autosomes known as the SRY group. B. the Y chromosome. C. chromosome number 21. D. the X chromosome. E. chromosome number 22.
All of the following are correct EXCEPT:
a) The first law of them odynamics states that energy can never be created or destroyed b) the second law of thermodynamics states that every conversion of energy is not perfectly efficient and includes the transformation of some energy into heat c) heat is one of the most useful forms of energy to living organisms