Exam 26: The Origin and Diversification of Eukaryotes

For each pair of groups below, describe how you could recognize members of the two groups and differentiate them from one another.Then describe features that the two groups in each pair share. a. Foraminiferans and radiolarians b. Ciliates and dinoflagellates c. Diatoms and brown algae d. Plasmodial slime molds and cellular slime molds

Paramecia have an elaborate sexual behavior in which they line up against each other and fuse.This is followed by an extensive reorganization and exchange of nuclear material.The entire process is called

Which characteristic of eukaryotes is not related to the presence of flexible cell membranes?

Which event is not normally associated with the life cycle of a plasmodial slime mold?

Budding is

Which is about foraminiferans is true?

_______ are protists that possess sacs, called alveoli, just beneath their plasma membranes.These structures may play a role in supporting the cell surface.

How might someone distinguish between diplomonads and parabasalids?

One spring day while on a walk, you discover a puddle full of photosynthetic microbial eukaryotes.You collect a sample and bring it back to your lab with the hopes of identifying the predominant photosynthetic group in the mix.Design an experiment to determine whether these photosynthetic organisms are euglenids.

Refer to the table. Formulate one or more hypotheses to explain a correlation coefficient of r = -0.948 for the relationship between survival index of larval haddock against the deviation in the date of the spring phytoplankton bloom Keep in mind that larval haddock include phytoplankton in their diet and that phytoplankton blooms also provide some cover in which larval fish can hide from potential predators.

If you encountered organisms with an amoeboid form but lacking conventional mitochondria, they would most likely be _______, which comprise a group that is not at all closely related to the loboseans, an amoebozoan group.

_______ produce new organisms through mitotic division.In this they are unlike gametes, which can produce new organisms only by fusing with other gametes.

Which of the following obtain nutrients by autotrophy?

Which of the following was not an early step in the evolution of eukaryotic cells?

Which of the following includes a species that causes a sexually transmitted disease in humans?

An abundance of dinoflagellates can do all of the following except

Choose the statement concerning alternation of generations that is false.

The _______ are marine microbial protists that secrete a glassy endoskeleton.

Sex and reproduction are independent of each other in the ciliates.What does that suggest about the role of sex in maintenance of populations?

Dinoflagellates have endosymbiotic relationships with corals.Corals cannot produce photosynthetic pigments, but they receive photosynthetic products from dinoflagellates.Which of the following might explain why corals are damaged or destroyed by excessive turbidity of ocean waters?