The key specializations that occurred in the evolution of mammals include all of the following except
A. warm-bloodedness.
B. the presence of a placenta in most.
C. different teeth suited to their diet.
D. digestive tract specialization.
E. reduction in brain size.
E. reduction in brain size.
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A vascular bundle
A. contains xylem and phloem. B. is not found in leaves. C. is usually scattered in the stem of a eudicot. D. is on the outer surface of a root. E. is very distinct in the apical meristem.
How are the five nucleotides similar to each other?
a. All five are composed of a phosphate group, sugar, and a nitrogenous base. b. All five contain the same nitrogenous base. c. All five have the same number of atoms.
Which of the following can affect enzyme
activity?
a. temperature change b. pH change c. changes in salt concentrations d. regulatory molecules e. all of these
Which of the following pairs of terms is mismatched?
A) bacteriostatic — kills vegetative bacterial cells B) germicide — kills microbes C) virucide — inactivates viruses D) sterilant — destroys all living microorganisms E) fungicide — kills yeasts and molds