Zookeepers In China Have Successfully Crossed A Female Bengal Tiger With A Male African Lion. After A Few Week?
Zookeepers in china have successfully crossed a female Bengal tiger with a male African lion. After a few weeks, however, the cubs seem weaker than other tigers offspring. The zookkeepers later find out that the cubs are unable to reproduce at all. This is an example of a/an ___ isolation mechanism.
A. ecological
B. temporal
C. postzygotic
D. mechanical
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Postzygotic.
Ecological isolation mechanism would be the distance between two organisms. This is true in the wild. (Lions live in Africa, tigers in Asia) but in captivity lions and tigers often live side by side.
Temporal isolation mechanism would be the time difference between two organisms. This would prevent lions mating with the now extinct sabertooth tiger, but lions and bengal tigers exsist now in the same time period
Mechanical isolation mechanism: This is possible when two creatures mate but are unable to produce offspring, or it could be that two organisms are unable to mate. (Different mating rituals is an example)
Postzygote is the answer. The word literally means “After the fertalized egg” all the other isolation mechanisms happen prezygote, before the egg can be fertilized. THe bengal tiger and lion have produced offspring, but they are not viable becuase they (the offspring) cannot reproduce.
Hoped that helped!
C postzygotic
My guess is temporal.