Which of the following effects can occur because of the high surface tension of water?
A) Lakes cannot freeze solid in winter, despite low temperatures.
B) A raft spider can walk across the surface of a small pond.
C) Organisms can resist temperature changes, although they give off heat due to chemical reactions.
D) Sweat can evaporate from the skin, helping to keep people from overheating.
E) Water can flow upward from roots to the leaves in plants.
Answer: B
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Which of the following assists the alignment of sister chromatids during metaphase?
A. Radial loop domains B. Cohesin C. Centromeres D. Nucleosomes E. Condensin
Birds store food in a modified portion of the lower esophagus called the
A. crop. B. epiglottis. C. gizzard. D. alimentary canal. E. pharynx.
Which of the following lists the structures of the male reproductive tract in the proper order from sperm production to ejaculation?
A. seminal vesicles; vas deferens; prostate; urethra; ejaculatory duct B. vas deferens; epididymis; seminiferous tubules; ejaculatory duct; urethra C. vas deferens; epididymis; seminal vesicles; ejaculatory duct; urethra D. epididymis; seminiferous tubules; ejaculatory duct; vas deferens; urethra E. seminiferous tubules; epididymis; vas deferens; ejaculatory duct; urethra
Four of the following statements about the H5N1 virus are true. Which one is false?
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