The stramenopiles are an extremely diverse group of organisms which would appear to have very little in common with one another. The one unifying feature in this group is the presence of _________ ________ at some point in the life cycle.
Fill in the blank(s) with the appropriate word(s).
heterokont flagella
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In some instances environmental change causes a situation where one phenotype is favored for a period of time, and then a different phenotype is favored. This oscillating selection causes
A. the maintenance of genetic variation in the population. B. an increase in point mutations. C. elimination of rarer genotypes because of uneven selection. D. extinction of the population. E. high population increase to maintain phenotypic variation.
Australia and Eurasia each have a mouse-like mammal, one a marsupial, the other a placental. This is
an example of
a. long-distance migration. b. homology. c. adaptive radiation. d. convergent evolution. e. coincidence.
Symptoms are
A) subjective characteristics of a disease that only the patient can feel. B) objective manifestations of a disease that can be measured. C) objective manifestations of a disease that can be observed by others. D) characteristics of a disease, such as sweating. E) laboratory tests used to diagnose a disease.
Which of the following causes serious congenital disease from transplacental transmission?
A. Toxoplasmosis B. Giardiasis C. Malaria D. Balantidiasis E. Trichomoniasis