A cocklebur is dispersed by ________, whereas most fleshy, edible fruits are eaten by animals that ________
A) wind; fully digest the fruits, including the seeds, which are killed
B) water currents; defecate the intact seeds
C) hitching rides on animals; fully digest the fruits, including the seeds, which are killed
D) hitching rides on animals; defecate the intact seeds
Answer: D
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Two F+ E. coli strains are co-cultured in the same flask. One is Strr Thr+ and the other is Genr Thr?. The culture is then plated on minimal media that is supplemented with gentamycin only (not threonine) and a few colonies grow. What sort of genetic exchange is most likely occurring?
A) transformation B) conjugation C) transduction D) electroporation
Signaling molecules act to adjust __________ in all
animals. a. growth b. metabolism c. gene expression d. reproduction e. all of these
The information carried by DNA is incorporated in a code specified by the:a
phosphodiester bonds of the DNA strand. b. number of separate strands of DNA. c. size of a particular chromosome. d. specific nucleotide sequence of the DNA molecule. e. number of bases in a DNA strand
Which of the following nematodes can be transmitted by mosquitoes?
A) Wuchereria bancrofti B) Ascaris lumbricoides C) Ancylostoma duodenale D) Necator americanus E) Enterobius vermicularis