Which of the following equations best summarizes photosynthesis?
A) 6 CO2 + 6 H2O + 6 O2 ? C6H12O6
B) 6 CO2 + 6 H2O ? C6H12O6 + 6 O2
C) 6 CO2 + 6 O2 ? C6H12O6 + 6 H2O
D) C6H12O6 + 6 O2 ? 6 CO2 + 6 H2O
B
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Many songbirds breed in North America in the spring and summer and then migrate to Central and South America in the fall. They spend the winter in these warmer areas, where they feed and prepare for the spring migration north and another breeding season
Two hypothetical species of sparrow, A and B, overwinter together in mixed flocks in Costa Rica. In spring, species A goes to the east coast of North America, and species B goes to the west coast. What can you say about the isolating mechanisms of these two species? A) They must have strong postzygotic isolating mechanisms to spend winter in such close proximity. B) They must have strong prezygotic isolating mechanisms to spend winter in such close proximity. C) Their winter habitat has no bearing on their degree of reproductive isolation. D) Reinforcement must be occurring when they winter together.
Approximately ____ Y-linked genes have been discovered
a. 10 b. 20 c. 60 d. 80 e. 120
. If you place a plain, dry cracker in your mouth, you will slowly notice a sweet taste. Why? What will be an ideal response?
Male fish that display a bright blue color attract more mates as well as more predators. Maintaining that blue gene in the population is an example of
A) the founder effect. B) coevolution. C) genetic drift. D) sexual selection. E) a population bottleneck.