Closely related plant species, found in the same geographical location, can attract different pollinators. This type of reproductive isolation is an example of
Answer: Sympatric speciation
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The immune system consists of ____
a. physical barriers only b. innate immunity only c. adaptive immunity only d. innate and adaptive immunity only e. physical barriers, innate immunity, and adaptive immunity
One way to control herd sizes in national parks is the reintroduction of predators, but this course is opposed by
A. animal rights activists. B. neighbors and local ranchers. C. wilderness advocates. D. scientists. E. park rangers.
In a flowering plant, the __________ is the site of meiosis and, ultimately, the production of pollen
a. stigma b. style c. carpel d. anther e. filament
Lactose induces the transcription of the lactose operon by:
a. binding to the allosteric site of the repressor after being converted to allolactose. b. stimulating lactose metabolism in the cell. c. first being converted to glucose, then binding to the repressor. d. binding to the allosteric site of RNA polymerase. e. inhibiting the activity of CAP.