You have performed a Gram stain, and upon completion of the procedure, the cells are colorless. Which of the following best explains your results?
A. The cells are gram+, and you did not decolorize using alcohol
B. The cells are gram+, and you forgot to use the crystal violet
C. The cells are gram-, and you forgot to use the safranin
D. The cells are gram-, and you did not decolorize using alcohol
Ans: C. The cells are gram-, and you forgot to use the safranin
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Consider a population undergoing logistic growth. When are the most individuals added to the population per unit time? Why? (You may want to refer to Fig. 46.5.)
A. (K-N)/K = 1 B. (K-N)/K = 0.75 C. (K-N)/K = 0.5 D. (K-N)/K = 0.25 E. (K-N)/K = 0
Lizards can control spider populations on Caribbean islands by which density-dependent mechanism(s)?
a. predation only b. competition only c. predation on a common predator only d. predation and competition e. predation, competition, and predation on a common predator
Identify three functions of proteins other than enzymes and briefly discuss or describe each.What will be an ideal response?
Which of the following is a salt?
A. NaOH B. HOH C. H2SO4 D. MgCl2