Exam 28: Protists

The following questions refer to the description below. You and a friend were walking through a pet store looking at the different aquaria with fish. Most of the aquaria had fish that were healthy and colourful, but two tanks with many fish in them had fish with "fin and tail rot" caused by a pathogenic bacteria. You and your friend read that bacteria are found in most environments and that healthy fish are quite resistant to bacterial infections. -Test tube 5 contains

Which process results in genetic recombination, but is separate from the process by which the population size of Paramecium increases?

Ciliates do not

An individual mixotroph loses its plastids, yet continues to survive. Which of the following most likely accounts for its continued survival?

If the Archaeplastidae are eventually designated a kingdom, and if land plants are excluded from this kingdom, then what will be true of this new kingdom?

Which of the following is characteristic of ciliates?

Green algae differ from land plants in that many green algae

Diatoms are mostly asexual members of the phytoplankton. Diatoms lack any organelles that might have the 9 + 2 pattern. They obtain their nutrition from functional chloroplasts, and each diatom is encased within two porous, glasslike valves. Which question would be most important for one interested in the day-to-day survival of individual diatoms?

You are given the task of designing an aquatic protist that is a primary producer. It cannot swim on its own, yet must stay in well-lit surface waters. It must be resistant to physical damage from wave action. It should be most similar to a(n)

Plastids that are surrounded by more than two membranes are evidence of

A large seaweed that floats freely on the surface of deep bodies of water would be expected to lack which of the following?

All protists are

A crucial photosynthetic gene of the cyanobacterium that gave rise to the cyanelle is called psaE. This gene is present in the nuclear genome of the cercozoan, but is not in the genome of the cyanelle. This is evidence of

Which two genera have members that can evade the human immune system by frequently changing their surface proteins? 1. Plasmodium 2. Trichomonas 3. Paramecium 4. Trypanosoma 5. Entamoeba

Biologists suspect that endosymbiosis gave rise to mitochondria before plastids partly because

In alternation of generation in brown algae, which pair is incorrectly matched?

The chloroplasts of all of the following are thought to be derived from ancestral red algae, except those of

Which of the following is correctly described as a primary producer?

Reinforced, threadlike pseudopods that can perform phagocytosis are generally characteristic of which group?

In life cycles with an alternation of generations, multicellular haploid forms alternate with