Which of the following is NOT formed during the Krebs cycle?
A.) CO2
B.) FADH2
C.) NADH
D.) H2O
Ans: D.) H2O
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The genotype of a particular pea plant is TtYy, corresponding to a phenotype of tall and yellow. How many different types of gametes are expected to be produced by this individual?
A) 1 B) 2 C) 4 D) 5 E) 8
The wood duck shown in the above photograph was adversely affected by ____ and is making a comeback thanks to
____. a. global cooling; heat producing chemical added to their diet b. sexually transmitted viruses; a new vaccine c. limited numbers of natural cavities; artificial nesting boxes d. high incidence of males being born; transplantation of females from other areas e. invasive species; removal of introduced predators
Stimulants include
a. nicotine. b. amphetamines. c. caffeine. d. cocaine. e. all of these.
Protists that are part of a(n) _____ are integrated with other cells, but remain self-sufficient
a. multicellular organism b. colonial organism c. contractile vacuole d. algal bloom e. pathogenic life cycle