Which of the following proteins is a transcriptional factor that binds genes and regulates the transcription of genes that promote cell division?
A. GRB2
B. epidermal growth factor
C. myc
D. raf-1
E. MAPK
C. myc
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The most complex wayfinding mechanism is ____, in which animals use both a compass and a mental
map of the area.
a. piloting b. orienteering c. compass orientation d. migration e. navigation
The teeth designated by the letter “D” in the above
figure are called a. canines. b. premolars. c. incisors. d. molars. e. none of these.
The rate at which an ecosystem's producers convert solar energy to chemical energy stored in biomass is called ________
A) energy flow B) chemical cycle C) primary productivity D) trophic structure
Why are "fortified" foods more likely to spoil than are unfortified foods?
A) The added vitamins and minerals can promote microbial growth. B) The foods are fortified by the addition of vitamin-producing microbes. C) Every step of modification or manipulation of food increases the chance for contamination. D) Vitamins are frequently contaminated by the microbes that produced them. E) The vitamins require a neutral pH environment, which is suitable for many microbes.