1. Its host specificity made the beetle a relatively safe choice for introduction. 2. There are several types of rhizobia, and some have a high degree of host specificity . 3. There is evidence of host specificity and selection of particular biting sites for some species. 4. Recent studies proposed to discriminate between two different types of evolutionary changes in host specificity . 5. However, the degree of host specificity varies strongly. 6. "Trichogramma " species vary in their host specificity . 7. All symbiotic species, such as parasites, pathogens and mutualists exhibit a certain degree of host specificity . 8. "Plasmodium " species were originally classified into subgenera based on their morphology, location, and host specificity . 9. Many other host specificity , and competitor number. 10. Such narrow host specificity can be costly over evolutionary time, however, if the host species becomes extinct.
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