A certain unicellular eukaryote has a siliceous (glasslike) shell and autotrophic nutrition. To which group does it belong?
A) dinoflagellate
B) diatom
C) gymnamoeba
D) foraminiferan
E) cellular slime mold
Ans: B) diatom
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The genus Mycobacterium ________.
A. have cell walls similar to Gram-negative bacteria B. stain acid-fast C. are strict anaerobes and catalase positive and have cell walls similar to Gram-negative bacteria D. are strict anaerobes and catalase positive
What is the scientific term for when a plant loses its leaves in the fall, and which hormone triggers this response?
a. thigmotropism, cytokinin b. photomorphogenesis, gibberelins c. abscission, auxins d. dormancy, abscisic acid
Which cancer symptoms include frequent urination especially at night, difficulty in urination, and difficulty emptying the bladder?
A. Testicular B. Prostate C. Uterine D. Penile
For most of its approximately million year history, the human population has been in the ____ phase of population growth.
A. lag B. exponential growth C. deceleration D. stable equilibrium