A hybrid zone is properly defined as
a. an area adjacent to tow closely related species
b. an area where mating occurs between members of two closely related species, producing viable offspring
c. a zone that features a gradual change in species compostion between two neighboring ecosystems that border each other
d. a zone that includes the intermediate portion of a cline
e. an area where members of two closely related species intermingle, but experience no gene flow.
Answer: b. an area where mating occurs between members of two closely related species, producing viable offspring
You might also like to view...
The reactions of the Calvin cycle used to be referred to as the "dark reactions" of photosynthesis, implying that light was not required for this pathway to incorporate CO2 into carbohydrate
However, in the absence of light the Calvin cycle shuts down. Which of the following parts of the Calvin cycle would be impacted FIRST by the absence of light energy? A. the reduction of 3-phosphoglycerate and the regeneration of RuBP B. the carboxylation of RuBP and the reduction of 3-phosphoglycerate C. the carboxylation of RuBP and the regeneration of RuBP D. the carboxylation of RuBP and the synthesis of hexose sugars
Transcription of ribosomal RNA is primarily the function of
A) primase. B) RNA polymerase I. C) RNA polymerase II. D) RNA polymerase III. E) mitochondrial RNA polymerase.
The organism shown above is using which of
the following types of reproduction? a. asexual budding b. sexual production of eggs c. hermaphroditic co-fertilization d. a combination of all three e. none of these
Which of the following is the best interpretation of the graph below of mussel size (x-axis) versus energy gain (line graph, left y-axis), and number of mussels eaten per day (histogram, right y-axis)? 
A. Crabs select mussels in a way that maximizes their energy gain. B. Mussel size does not seem to be a good predictor as to which mussel hungry crabs will select. C. Crabs prefer the mussels with the smallest length for their food resources. D. Mussels are selected as food sources by crabs. E. Crabs tend to consume most of the largest mussels.