Which of the following are newly acquired characteristics of E. coli cells successfully transformed with pGLO? select all that apply
A. arabinose production
B. green fluorescence under UV light
C. ampicillin resistance
D. lactose fermentation
Ans:
B. green fluorescence under UV light
C. ampicillin resistance
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Which of the following lists the structures of the male reproductive tract in the proper order from sperm production to ejaculation?
A. vas deferens, epididymis, seminiferous tubules, ejaculatory duct, urethra B. seminal vesicles, vas deferens, prostate, urethra, ejaculatory duct C. seminiferous tubules, epididymis, vas deferens, ejaculatory duct, urethra D. vas deferens, epididymis, seminal vesicles, ejaculatory duct, urethra E. epididymis, seminiferous tubules, ejaculatory duct, vas deferens, urethra
Which animal clade lacks specialized tissues derived from the germ layers of the embryo?
a. Cnidaria b. Ctenophora c. Placozoa d. Bilateria
All of the following statements are true
concerning mycorrhizae EXCEPT that a. the fungus may penetrate into root cells. b. mycorrhizae increase the surface area for absorption. c. roots obtain minerals from the fungus. d. the fungus provides the plant with nitrogenrich compounds. e. it is a mutualistic symbiosis
During an active HIV infection, which cell type numbers drop significantly?
a. helper T cells b. B cells c. plasma cells d. mast cells e. cytotoxic T cells